/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 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:59:03,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:59:03,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:59:03,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:59:03,485 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 21:59:03,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:59:03,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:59:03,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:59:03,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:59:03,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:59:03,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:59:03,507 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:59:03,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:59:03,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:59:03,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:59:03,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:59:03,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:59:03,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:59:03,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:59:03,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:59:03,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:59:03,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:59:03,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:59:03,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:59:03,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:59:03,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:59:03,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:59:03,509 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:59:03,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:59:03,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:59:03,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:59:03,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:59:03,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:59:03,802 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:59:03,805 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:59:03,805 INFO L432 ainManager$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 21:59:03,806 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 21:59:03,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:59:03,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:59:03,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:59:03,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:59:03,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:59:03,890 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,897 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:59:03,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:59:03,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:59:03,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:59:03,916 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,916 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,919 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,920 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,923 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,925 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,926 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 09:59:03" (1/1) ... [2021-06-05 21:59:03,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:59:03,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:59:03,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:59:03,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:59:03,941 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 09:59:03" (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 21:59:04,011 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:59:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:59:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:59:04,012 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:59:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:59:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:59:04,012 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:59:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:59:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:59:04,013 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:59:04,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:59:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:59:04,015 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 21:59:04,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:59:04,505 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 21:59:04,507 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:59:04 BoogieIcfgContainer [2021-06-05 21:59:04,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:59:04,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:59:04,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:59:04,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:59:04,511 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 09:59:03" (1/2) ... [2021-06-05 21:59:04,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637b2a95 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:59:04, skipping insertion in model container [2021-06-05 21:59:04,511 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 09:59:04" (2/2) ... [2021-06-05 21:59:04,512 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2021-06-05 21:59:04,517 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:59:04,517 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:59:04,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:59:04,518 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:59:04,560 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 21:59:04,577 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 21:59:04,594 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:59:04,594 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:59:04,594 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:59:04,594 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:59:04,594 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:59:04,594 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:59:04,594 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:59:04,595 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:59:04,601 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-05 21:59:04,618 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 21:59:04,621 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 21:59:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:59:04,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:04,628 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:04,628 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-06-05 21:59:04,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:04,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137069899] [2021-06-05 21:59:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:04,797 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 21:59:04,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137069899] [2021-06-05 21:59:04,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137069899] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:59:04,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:59:04,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:59:04,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735604096] [2021-06-05 21:59:04,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:59:04,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:04,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:59:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:59:04,825 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 21:59:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:04,893 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2021-06-05 21:59:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:59:04,895 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 21:59:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:04,912 INFO L225 Difference]: With dead ends: 192 [2021-06-05 21:59:04,912 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:59:04,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:59:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:59:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-06-05 21:59:04,948 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 21:59:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-05 21:59:04,951 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-05 21:59:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:04,952 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-05 21:59:04,952 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 21:59:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-05 21:59:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:59:04,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:04,954 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:04,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:59:04,954 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:04,955 INFO L82 PathProgramCache]: Analyzing trace with hash -179193603, now seen corresponding path program 1 times [2021-06-05 21:59:04,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:04,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342271663] [2021-06-05 21:59:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:05,052 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 21:59:05,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:05,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342271663] [2021-06-05 21:59:05,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342271663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276547774] [2021-06-05 21:59:05,053 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 21:59:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:59:05,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:05,401 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 21:59:05,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276547774] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:59:05,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:59:05,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-06-05 21:59:05,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479878153] [2021-06-05 21:59:05,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:59:05,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:05,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:59:05,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:59:05,404 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 21:59:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:05,584 INFO L93 Difference]: Finished difference Result 202 states and 574 transitions. [2021-06-05 21:59:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:59:05,585 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 21:59:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:05,587 INFO L225 Difference]: With dead ends: 202 [2021-06-05 21:59:05,587 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:59:05,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:59:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:59:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-06-05 21:59:05,603 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 21:59:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 457 transitions. [2021-06-05 21:59:05,604 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 457 transitions. Word has length 18 [2021-06-05 21:59:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:05,605 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 457 transitions. [2021-06-05 21:59:05,605 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 21:59:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 457 transitions. [2021-06-05 21:59:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:59:05,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:05,607 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:05,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:59:05,829 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2052535307, now seen corresponding path program 2 times [2021-06-05 21:59:05,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:05,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451199702] [2021-06-05 21:59:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:05,892 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 21:59:05,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:05,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451199702] [2021-06-05 21:59:05,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451199702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:05,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103522729] [2021-06-05 21:59:05,893 INFO L93 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 21:59:05,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-06-05 21:59:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:59:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:06,079 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 21:59:06,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103522729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:59:06,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:59:06,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-06-05 21:59:06,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633981203] [2021-06-05 21:59:06,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:59:06,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:59:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:59:06,081 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 21:59:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:06,154 INFO L93 Difference]: Finished difference Result 252 states and 727 transitions. [2021-06-05 21:59:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:59:06,155 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 21:59:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:06,158 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:59:06,158 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:59:06,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:59:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:59:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-06-05 21:59:06,176 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 21:59:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-06-05 21:59:06,177 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2021-06-05 21:59:06,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:06,177 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-06-05 21:59:06,177 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 21:59:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-06-05 21:59:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:06,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:06,179 INFO L554 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 21:59:06,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:06,401 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:06,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:06,402 INFO L82 PathProgramCache]: Analyzing trace with hash -433592789, now seen corresponding path program 1 times [2021-06-05 21:59:06,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:06,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968591241] [2021-06-05 21:59:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:06,581 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 21:59:06,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:06,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968591241] [2021-06-05 21:59:06,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968591241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:06,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248474288] [2021-06-05 21:59:06,582 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 21:59:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:06,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:59:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:06,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:06,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:06,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:06,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:06,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:06,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:06,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 21:59:07,243 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 21:59:07,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248474288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:07,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:07,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 21:59:07,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379603524] [2021-06-05 21:59:07,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:59:07,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:07,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:59:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:59:07,245 INFO L87 Difference]: Start difference. First operand 158 states and 457 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 21:59:08,133 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 21:59:08,587 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-06-05 21:59:08,914 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 21:59:09,133 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-06-05 21:59:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:09,419 INFO L93 Difference]: Finished difference Result 622 states and 1771 transitions. [2021-06-05 21:59:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:59:09,420 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 21:59:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:09,424 INFO L225 Difference]: With dead ends: 622 [2021-06-05 21:59:09,424 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 21:59:09,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1981.5ms TimeCoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 21:59:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 210. [2021-06-05 21:59:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.9904306220095696) internal successors, (625), 209 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 625 transitions. [2021-06-05 21:59:09,439 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 625 transitions. Word has length 19 [2021-06-05 21:59:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:09,439 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 625 transitions. [2021-06-05 21:59:09,440 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 21:59:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 625 transitions. [2021-06-05 21:59:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:09,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:09,442 INFO L554 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 21:59:09,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:09,665 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash -730699061, now seen corresponding path program 2 times [2021-06-05 21:59:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:09,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180790795] [2021-06-05 21:59:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:09,794 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 21:59:09,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:09,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180790795] [2021-06-05 21:59:09,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180790795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:09,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986717694] [2021-06-05 21:59:09,795 INFO L93 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 21:59:09,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:09,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:09,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:59:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:10,038 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 21:59:10,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,044 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 12 treesize of output 8 [2021-06-05 21:59:10,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:10,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:10,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:10,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,094 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-06-05 21:59:10,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:10,096 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:113, output treesize:38 [2021-06-05 21:59:10,196 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 21:59:10,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986717694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:10,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:10,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 21:59:10,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93249244] [2021-06-05 21:59:10,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:59:10,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:10,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:59:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:59:10,198 INFO L87 Difference]: Start difference. First operand 210 states and 625 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 21:59:10,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:10,763 INFO L93 Difference]: Finished difference Result 372 states and 1079 transitions. [2021-06-05 21:59:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:10,763 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 21:59:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:10,765 INFO L225 Difference]: With dead ends: 372 [2021-06-05 21:59:10,765 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 21:59:10,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 21:59:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 225. [2021-06-05 21:59:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.0357142857142856) internal successors, (680), 224 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 680 transitions. [2021-06-05 21:59:10,774 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 680 transitions. Word has length 19 [2021-06-05 21:59:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:10,775 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 680 transitions. [2021-06-05 21:59:10,775 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 21:59:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 680 transitions. [2021-06-05 21:59:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:10,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:10,777 INFO L554 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 21:59:11,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:11,000 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1087878037, now seen corresponding path program 3 times [2021-06-05 21:59:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:11,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449259860] [2021-06-05 21:59:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:11,091 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 21:59:11,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:11,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449259860] [2021-06-05 21:59:11,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449259860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:11,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837864267] [2021-06-05 21:59:11,092 INFO L93 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 21:59:11,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:59:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:11,309 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 18 treesize of output 12 [2021-06-05 21:59:11,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:11,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:11,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,326 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 19 treesize of output 13 [2021-06-05 21:59:11,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,332 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 5 treesize of output 3 [2021-06-05 21:59:11,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:11,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:11,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,358 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 18 treesize of output 12 [2021-06-05 21:59:11,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:11,367 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:11,375 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:11,380 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,481 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-05 21:59:11,482 INFO L628 ElimStorePlain]: treesize reduction 100, result has 51.7 percent of original size [2021-06-05 21:59:11,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 21:59:11,487 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:389, output treesize:107 [2021-06-05 21:59:11,704 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 21:59:11,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837864267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:11,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:11,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 21:59:11,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732036635] [2021-06-05 21:59:11,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:59:11,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:11,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:59:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:59:11,705 INFO L87 Difference]: Start difference. First operand 225 states and 680 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 21:59:11,961 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 21:59:12,112 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 21:59:12,449 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 21:59:12,630 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 21:59:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:12,711 INFO L93 Difference]: Finished difference Result 483 states and 1353 transitions. [2021-06-05 21:59:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:12,712 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 21:59:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:12,714 INFO L225 Difference]: With dead ends: 483 [2021-06-05 21:59:12,714 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 21:59:12,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 985.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:59:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 21:59:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 230. [2021-06-05 21:59:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.078602620087336) internal successors, (705), 229 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 705 transitions. [2021-06-05 21:59:12,723 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 705 transitions. Word has length 19 [2021-06-05 21:59:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:12,723 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 705 transitions. [2021-06-05 21:59:12,723 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 21:59:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 705 transitions. [2021-06-05 21:59:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:12,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:12,724 INFO L554 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 21:59:12,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 21:59:12,941 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash 27099947, now seen corresponding path program 4 times [2021-06-05 21:59:12,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:12,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668747054] [2021-06-05 21:59:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:13,060 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 21:59:13,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:13,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668747054] [2021-06-05 21:59:13,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668747054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:13,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780153200] [2021-06-05 21:59:13,061 INFO L93 rtionOrderModulation]: Changing 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 21:59:13,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:13,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:59:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:13,260 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 18 treesize of output 12 [2021-06-05 21:59:13,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,265 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 18 treesize of output 12 [2021-06-05 21:59:13,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,271 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 21:59:13,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,276 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 19 treesize of output 13 [2021-06-05 21:59:13,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,282 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 19 treesize of output 13 [2021-06-05 21:59:13,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:13,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:13,295 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,299 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 11 treesize of output 7 [2021-06-05 21:59:13,301 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,373 INFO L628 ElimStorePlain]: treesize reduction 67, result has 54.1 percent of original size [2021-06-05 21:59:13,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:59:13,374 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:257, output treesize:79 [2021-06-05 21:59:13,533 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 21:59:13,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780153200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:13,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:13,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:59:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904447583] [2021-06-05 21:59:13,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:13,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:13,535 INFO L87 Difference]: Start difference. First operand 230 states and 705 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 21:59:14,059 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-05 21:59:14,248 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 21:59:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:14,375 INFO L93 Difference]: Finished difference Result 460 states and 1305 transitions. [2021-06-05 21:59:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:14,375 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 21:59:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:14,378 INFO L225 Difference]: With dead ends: 460 [2021-06-05 21:59:14,378 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 21:59:14,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:59:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 21:59:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 235. [2021-06-05 21:59:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.0982905982905984) internal successors, (725), 234 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 725 transitions. [2021-06-05 21:59:14,386 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 725 transitions. Word has length 19 [2021-06-05 21:59:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:14,387 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 725 transitions. [2021-06-05 21:59:14,387 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 21:59:14,387 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 725 transitions. [2021-06-05 21:59:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:14,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:14,388 INFO L554 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 21:59:14,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:14,601 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1446987595, now seen corresponding path program 5 times [2021-06-05 21:59:14,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:14,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768479018] [2021-06-05 21:59:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:14,698 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 21:59:14,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768479018] [2021-06-05 21:59:14,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768479018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252179003] [2021-06-05 21:59:14,698 INFO L93 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 21:59:14,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:14,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:59:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:14,881 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 5 treesize of output 3 [2021-06-05 21:59:14,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:14,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:14,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,891 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 12 treesize of output 8 [2021-06-05 21:59:14,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,895 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 11 treesize of output 7 [2021-06-05 21:59:14,896 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,917 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 21:59:14,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:14,918 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-06-05 21:59:14,997 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 21:59:14,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252179003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:14,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:14,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 21:59:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582565865] [2021-06-05 21:59:14,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:14,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:14,999 INFO L87 Difference]: Start difference. First operand 235 states and 725 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 21:59:15,315 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 21:59:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:15,828 INFO L93 Difference]: Finished difference Result 477 states and 1356 transitions. [2021-06-05 21:59:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:15,829 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 21:59:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:15,833 INFO L225 Difference]: With dead ends: 477 [2021-06-05 21:59:15,834 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 21:59:15,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:59:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 21:59:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 255. [2021-06-05 21:59:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.1102362204724407) internal successors, (790), 254 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 790 transitions. [2021-06-05 21:59:15,842 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 790 transitions. Word has length 19 [2021-06-05 21:59:15,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:15,842 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 790 transitions. [2021-06-05 21:59:15,842 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 21:59:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 790 transitions. [2021-06-05 21:59:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:15,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:15,843 INFO L554 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 21:59:16,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:16,057 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1407466373, now seen corresponding path program 6 times [2021-06-05 21:59:16,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:16,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613761457] [2021-06-05 21:59:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:16,149 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 21:59:16,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:16,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613761457] [2021-06-05 21:59:16,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613761457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:16,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349775330] [2021-06-05 21:59:16,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:59:16,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:16,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:59:16,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:16,363 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 13 treesize of output 9 [2021-06-05 21:59:16,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:16,368 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 13 treesize of output 9 [2021-06-05 21:59:16,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:16,373 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 13 treesize of output 9 [2021-06-05 21:59:16,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:16,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:16,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:16,382 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 5 treesize of output 3 [2021-06-05 21:59:16,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:16,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:16,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:16,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:16,390 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:16,431 INFO L628 ElimStorePlain]: treesize reduction 32, result has 54.3 percent of original size [2021-06-05 21:59:16,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:16,432 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:38 [2021-06-05 21:59:16,525 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 21:59:16,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349775330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:16,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:16,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:59:16,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833435493] [2021-06-05 21:59:16,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:16,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:16,530 INFO L87 Difference]: Start difference. First operand 255 states and 790 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 21:59:17,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:17,017 INFO L93 Difference]: Finished difference Result 355 states and 1084 transitions. [2021-06-05 21:59:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:17,017 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 21:59:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:17,019 INFO L225 Difference]: With dead ends: 355 [2021-06-05 21:59:17,019 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 21:59:17,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 21:59:17,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 260. [2021-06-05 21:59:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.1274131274131274) internal successors, (810), 259 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 810 transitions. [2021-06-05 21:59:17,027 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 810 transitions. Word has length 19 [2021-06-05 21:59:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:17,027 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 810 transitions. [2021-06-05 21:59:17,027 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 21:59:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 810 transitions. [2021-06-05 21:59:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:17,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:17,028 INFO L554 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 21:59:17,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 21:59:17,241 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:17,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1068923825, now seen corresponding path program 7 times [2021-06-05 21:59:17,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:17,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537976333] [2021-06-05 21:59:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:17,332 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 21:59:17,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:17,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537976333] [2021-06-05 21:59:17,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537976333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:17,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465606494] [2021-06-05 21:59:17,332 INFO 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 21:59:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:17,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:59:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:17,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:17,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,524 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 18 treesize of output 12 [2021-06-05 21:59:17,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:17,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,533 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 21:59:17,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:17,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:17,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:17,551 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:17,555 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:17,559 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,562 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 17 treesize of output 11 [2021-06-05 21:59:17,563 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:17,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:17,572 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,637 INFO L628 ElimStorePlain]: treesize reduction 48, result has 59.3 percent of original size [2021-06-05 21:59:17,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:59:17,638 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:409, output treesize:70 [2021-06-05 21:59:17,847 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 21:59:17,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465606494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:17,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:17,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 21:59:17,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060865585] [2021-06-05 21:59:17,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:59:17,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:17,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:59:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:59:17,848 INFO L87 Difference]: Start difference. First operand 260 states and 810 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 21:59:18,791 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 21:59:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:19,004 INFO L93 Difference]: Finished difference Result 521 states and 1523 transitions. [2021-06-05 21:59:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:59:19,004 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 21:59:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:19,007 INFO L225 Difference]: With dead ends: 521 [2021-06-05 21:59:19,007 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 21:59:19,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1052.0ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 21:59:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 275. [2021-06-05 21:59:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.2116788321167884) internal successors, (880), 274 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 21:59:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 880 transitions. [2021-06-05 21:59:19,015 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 880 transitions. Word has length 19 [2021-06-05 21:59:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:19,015 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 880 transitions. [2021-06-05 21:59:19,015 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 21:59:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 880 transitions. [2021-06-05 21:59:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:19,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:19,016 INFO L554 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 21:59:19,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:19,237 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2129701915, now seen corresponding path program 8 times [2021-06-05 21:59:19,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:19,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977944677] [2021-06-05 21:59:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:19,322 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 21:59:19,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:19,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977944677] [2021-06-05 21:59:19,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977944677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:19,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781627971] [2021-06-05 21:59:19,323 INFO L93 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 21:59:19,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:19,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:59:19,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:19,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:19,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,517 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 18 treesize of output 12 [2021-06-05 21:59:19,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,522 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 18 treesize of output 12 [2021-06-05 21:59:19,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:19,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,532 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 19 treesize of output 13 [2021-06-05 21:59:19,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:19,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,541 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 17 treesize of output 11 [2021-06-05 21:59:19,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,546 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 12 treesize of output 8 [2021-06-05 21:59:19,547 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:19,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:19,555 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:19,560 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,645 INFO L628 ElimStorePlain]: treesize reduction 87, result has 47.9 percent of original size [2021-06-05 21:59:19,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:59:19,646 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:386, output treesize:80 [2021-06-05 21:59:19,907 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 21:59:19,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781627971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:19,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:19,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-06-05 21:59:19,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820230279] [2021-06-05 21:59:19,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:19,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:19,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:19,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:19,909 INFO L87 Difference]: Start difference. First operand 275 states and 880 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 21:59:20,207 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-05 21:59:20,459 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 21:59:20,697 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 21:59:20,855 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 21:59:21,011 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 21:59:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:21,018 INFO L93 Difference]: Finished difference Result 546 states and 1601 transitions. [2021-06-05 21:59:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:59:21,018 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 21:59:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:21,020 INFO L225 Difference]: With dead ends: 546 [2021-06-05 21:59:21,020 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 21:59:21,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1110.8ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:59:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 21:59:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 280. [2021-06-05 21:59:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.225806451612903) internal successors, (900), 279 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 21:59:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 900 transitions. [2021-06-05 21:59:21,029 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 900 transitions. Word has length 19 [2021-06-05 21:59:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:21,029 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 900 transitions. [2021-06-05 21:59:21,029 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 21:59:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 900 transitions. [2021-06-05 21:59:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:21,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:21,030 INFO L554 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 21:59:21,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:21,245 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -709814267, now seen corresponding path program 9 times [2021-06-05 21:59:21,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:21,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207145631] [2021-06-05 21:59:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:21,334 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 21:59:21,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207145631] [2021-06-05 21:59:21,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207145631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732021290] [2021-06-05 21:59:21,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:59:21,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:59:21,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:21,526 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 5 treesize of output 3 [2021-06-05 21:59:21,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,532 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 19 treesize of output 13 [2021-06-05 21:59:21,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:21,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:21,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:21,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:21,552 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:21,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:21,560 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,564 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 19 treesize of output 13 [2021-06-05 21:59:21,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:21,570 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:21,574 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:21,578 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:21,582 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,640 INFO L628 ElimStorePlain]: treesize reduction 54, result has 51.8 percent of original size [2021-06-05 21:59:21,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:59:21,642 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:382, output treesize:58 [2021-06-05 21:59:21,803 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 21:59:21,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732021290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:21,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:21,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-06-05 21:59:21,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959245807] [2021-06-05 21:59:21,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:21,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:21,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:21,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:21,805 INFO L87 Difference]: Start difference. First operand 280 states and 900 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 21:59:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:22,578 INFO L93 Difference]: Finished difference Result 440 states and 1302 transitions. [2021-06-05 21:59:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:22,579 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 21:59:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:22,581 INFO L225 Difference]: With dead ends: 440 [2021-06-05 21:59:22,581 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 21:59:22,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 730.0ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 21:59:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 280. [2021-06-05 21:59:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.207885304659498) internal successors, (895), 279 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 21:59:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 895 transitions. [2021-06-05 21:59:22,588 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 895 transitions. Word has length 19 [2021-06-05 21:59:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:22,588 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 895 transitions. [2021-06-05 21:59:22,588 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 21:59:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 895 transitions. [2021-06-05 21:59:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:22,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:22,589 INFO L554 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 21:59:22,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:22,805 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:22,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:22,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1359026097, now seen corresponding path program 10 times [2021-06-05 21:59:22,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:22,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9798655] [2021-06-05 21:59:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:22,919 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 21:59:22,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:22,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9798655] [2021-06-05 21:59:22,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9798655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:22,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123650334] [2021-06-05 21:59:22,920 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 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 21:59:22,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:22,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:59:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:23,097 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 17 treesize of output 11 [2021-06-05 21:59:23,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,102 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 18 treesize of output 12 [2021-06-05 21:59:23,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,110 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 18 treesize of output 12 [2021-06-05 21:59:23,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:23,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:23,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:23,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:23,130 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:23,135 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:23,139 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:23,143 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,147 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 21:59:23,148 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,222 INFO L628 ElimStorePlain]: treesize reduction 96, result has 45.1 percent of original size [2021-06-05 21:59:23,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:59:23,223 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-06-05 21:59:23,520 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 21:59:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123650334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:23,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:23,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 21:59:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245844191] [2021-06-05 21:59:23,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:59:23,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:59:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:59:23,522 INFO L87 Difference]: Start difference. First operand 280 states and 895 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 21:59:23,865 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 21:59:24,157 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 21:59:24,428 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 21:59:24,608 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 21:59:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:24,635 INFO L93 Difference]: Finished difference Result 640 states and 1868 transitions. [2021-06-05 21:59:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:24,636 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 21:59:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:24,638 INFO L225 Difference]: With dead ends: 640 [2021-06-05 21:59:24,638 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 21:59:24,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1190.2ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:24,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 21:59:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 290. [2021-06-05 21:59:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.235294117647059) internal successors, (935), 289 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 21:59:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 935 transitions. [2021-06-05 21:59:24,649 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 935 transitions. Word has length 19 [2021-06-05 21:59:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:24,649 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 935 transitions. [2021-06-05 21:59:24,649 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 21:59:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 935 transitions. [2021-06-05 21:59:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:24,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:24,650 INFO L554 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 21:59:24,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:24,873 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1516053551, now seen corresponding path program 11 times [2021-06-05 21:59:24,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:24,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176630387] [2021-06-05 21:59:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:24,954 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 21:59:24,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176630387] [2021-06-05 21:59:24,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176630387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665197810] [2021-06-05 21:59:24,954 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 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 21:59:25,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:25,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:25,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:59:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:25,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:25,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:25,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:25,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:25,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,208 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 21:59:25,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,252 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 21:59:25,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:25,253 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:133, output treesize:49 [2021-06-05 21:59:25,346 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 21:59:25,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665197810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:25,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:25,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:59:25,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039292574] [2021-06-05 21:59:25,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:25,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:25,347 INFO L87 Difference]: Start difference. First operand 290 states and 935 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 21:59:25,795 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 21:59:26,008 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 21:59:26,255 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 21:59:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:26,333 INFO L93 Difference]: Finished difference Result 618 states and 1786 transitions. [2021-06-05 21:59:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:26,333 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 21:59:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:26,336 INFO L225 Difference]: With dead ends: 618 [2021-06-05 21:59:26,336 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 21:59:26,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 930.7ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:59:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 21:59:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 300. [2021-06-05 21:59:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.260869565217391) internal successors, (975), 299 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 975 transitions. [2021-06-05 21:59:26,345 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 975 transitions. Word has length 19 [2021-06-05 21:59:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:26,345 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 975 transitions. [2021-06-05 21:59:26,346 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 21:59:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 975 transitions. [2021-06-05 21:59:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:26,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:26,347 INFO L554 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 21:59:26,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 21:59:26,570 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:26,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1718135655, now seen corresponding path program 12 times [2021-06-05 21:59:26,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:26,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480546829] [2021-06-05 21:59:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:26,660 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 21:59:26,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:26,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480546829] [2021-06-05 21:59:26,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480546829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:26,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180559613] [2021-06-05 21:59:26,661 INFO L93 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 21:59:26,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:59:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:26,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:26,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:26,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:26,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,861 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 12 treesize of output 8 [2021-06-05 21:59:26,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:26,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:26,870 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:26,873 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,920 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.1 percent of original size [2021-06-05 21:59:26,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:59:26,921 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:231, output treesize:58 [2021-06-05 21:59:27,084 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 21:59:27,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180559613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:27,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:27,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 21:59:27,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398849049] [2021-06-05 21:59:27,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:59:27,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:59:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:59:27,087 INFO L87 Difference]: Start difference. First operand 300 states and 975 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 21:59:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:28,180 INFO L93 Difference]: Finished difference Result 539 states and 1584 transitions. [2021-06-05 21:59:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:28,180 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 21:59:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:28,182 INFO L225 Difference]: With dead ends: 539 [2021-06-05 21:59:28,182 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 21:59:28,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1037.6ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 21:59:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 300. [2021-06-05 21:59:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.2441471571906355) internal successors, (970), 299 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 21:59:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 970 transitions. [2021-06-05 21:59:28,190 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 970 transitions. Word has length 19 [2021-06-05 21:59:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:28,190 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 970 transitions. [2021-06-05 21:59:28,190 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 21:59:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 970 transitions. [2021-06-05 21:59:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:28,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:28,191 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:28,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:28,405 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1561325128, now seen corresponding path program 13 times [2021-06-05 21:59:28,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:28,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401518163] [2021-06-05 21:59:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:28,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401518163] [2021-06-05 21:59:28,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401518163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372687724] [2021-06-05 21:59:28,461 INFO 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 21:59:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:28,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:28,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:28,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:28,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:28,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:28,590 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 21:59:28,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:28,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 21:59:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:28,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372687724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:28,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:28,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 21:59:28,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059234526] [2021-06-05 21:59:28,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:28,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:28,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:28,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:28,636 INFO L87 Difference]: Start difference. First operand 300 states and 970 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 21:59:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:28,859 INFO L93 Difference]: Finished difference Result 536 states and 1624 transitions. [2021-06-05 21:59:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:28,859 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 21:59:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:28,861 INFO L225 Difference]: With dead ends: 536 [2021-06-05 21:59:28,862 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 21:59:28,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 21:59:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 283. [2021-06-05 21:59:28,868 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 21:59:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 927 transitions. [2021-06-05 21:59:28,869 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 927 transitions. Word has length 20 [2021-06-05 21:59:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:28,869 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 927 transitions. [2021-06-05 21:59:28,869 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 21:59:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 927 transitions. [2021-06-05 21:59:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:28,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:28,870 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:29,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 21:59:29,073 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash 269967037, now seen corresponding path program 14 times [2021-06-05 21:59:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:29,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106849909] [2021-06-05 21:59:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:29,146 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 21:59:29,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:29,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106849909] [2021-06-05 21:59:29,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106849909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111447023] [2021-06-05 21:59:29,147 INFO L93 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 21:59:29,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:29,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:29,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:29,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:29,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:29,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:29,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,278 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 21:59:29,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:29,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 21:59:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:29,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111447023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:29,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:59:29,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27754950] [2021-06-05 21:59:29,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:59:29,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:29,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:59:29,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:59:29,293 INFO L87 Difference]: Start difference. First operand 283 states and 927 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 21:59:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:29,539 INFO L93 Difference]: Finished difference Result 488 states and 1470 transitions. [2021-06-05 21:59:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:29,540 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 21:59:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:29,541 INFO L225 Difference]: With dead ends: 488 [2021-06-05 21:59:29,541 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 21:59:29,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:59:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 21:59:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-06-05 21:59:29,548 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 21:59:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1036 transitions. [2021-06-05 21:59:29,549 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1036 transitions. Word has length 20 [2021-06-05 21:59:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:29,549 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1036 transitions. [2021-06-05 21:59:29,549 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 21:59:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1036 transitions. [2021-06-05 21:59:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:29,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:29,550 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:29,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:29,765 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1428610567, now seen corresponding path program 15 times [2021-06-05 21:59:29,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:29,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681716805] [2021-06-05 21:59:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:29,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:29,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681716805] [2021-06-05 21:59:29,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681716805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517745246] [2021-06-05 21:59:29,830 INFO L93 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 21:59:29,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:29,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:29,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:29,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:29,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:29,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:29,961 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 21:59:29,989 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 21:59:29,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517745246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:29,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 21:59:29,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480111436] [2021-06-05 21:59:29,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:59:29,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:29,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:59:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:59:29,990 INFO L87 Difference]: Start difference. First operand 326 states and 1036 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 21:59:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:30,241 INFO L93 Difference]: Finished difference Result 540 states and 1591 transitions. [2021-06-05 21:59:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:30,241 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 21:59:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:30,244 INFO L225 Difference]: With dead ends: 540 [2021-06-05 21:59:30,245 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 21:59:30,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 21:59:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 329. [2021-06-05 21:59:30,253 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 21:59:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1047 transitions. [2021-06-05 21:59:30,254 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1047 transitions. Word has length 20 [2021-06-05 21:59:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:30,254 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1047 transitions. [2021-06-05 21:59:30,254 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 21:59:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1047 transitions. [2021-06-05 21:59:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:30,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:30,255 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:30,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 21:59:30,478 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:30,478 INFO L82 PathProgramCache]: Analyzing trace with hash -65297155, now seen corresponding path program 16 times [2021-06-05 21:59:30,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:30,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299070817] [2021-06-05 21:59:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:30,536 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 21:59:30,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:30,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299070817] [2021-06-05 21:59:30,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299070817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:30,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227314992] [2021-06-05 21:59:30,537 INFO L93 rtionOrderModulation]: Changing 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 21:59:30,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:30,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:30,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,668 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 21:59:30,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:30,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 21:59:30,693 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 21:59:30,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227314992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:30,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:30,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 21:59:30,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699054408] [2021-06-05 21:59:30,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:59:30,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:59:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:59:30,694 INFO L87 Difference]: Start difference. First operand 329 states and 1047 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 21:59:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:30,928 INFO L93 Difference]: Finished difference Result 497 states and 1488 transitions. [2021-06-05 21:59:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:30,928 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 21:59:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:30,930 INFO L225 Difference]: With dead ends: 497 [2021-06-05 21:59:30,930 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 21:59:30,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 21:59:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 329. [2021-06-05 21:59:30,937 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 21:59:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1044 transitions. [2021-06-05 21:59:30,938 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1044 transitions. Word has length 20 [2021-06-05 21:59:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:30,938 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1044 transitions. [2021-06-05 21:59:30,938 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 21:59:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1044 transitions. [2021-06-05 21:59:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:30,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:30,939 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:31,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-06-05 21:59:31,153 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:31,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1772265141, now seen corresponding path program 17 times [2021-06-05 21:59:31,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:31,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587229416] [2021-06-05 21:59:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:31,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:31,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587229416] [2021-06-05 21:59:31,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587229416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:31,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697955691] [2021-06-05 21:59:31,237 INFO L93 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 21:59:31,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:31,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:31,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:31,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:31,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697955691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:31,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:31,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:31,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831613831] [2021-06-05 21:59:31,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:31,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:31,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:31,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:31,489 INFO L87 Difference]: Start difference. First operand 329 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 21:59:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:31,768 INFO L93 Difference]: Finished difference Result 500 states and 1492 transitions. [2021-06-05 21:59:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:31,769 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 21:59:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:31,771 INFO L225 Difference]: With dead ends: 500 [2021-06-05 21:59:31,771 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 21:59:31,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 21:59:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 335. [2021-06-05 21:59:31,780 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 21:59:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1066 transitions. [2021-06-05 21:59:31,781 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1066 transitions. Word has length 20 [2021-06-05 21:59:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:31,781 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1066 transitions. [2021-06-05 21:59:31,781 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 21:59:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1066 transitions. [2021-06-05 21:59:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:31,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:31,784 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:32,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 21:59:32,007 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:32,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1028794433, now seen corresponding path program 18 times [2021-06-05 21:59:32,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:32,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337628401] [2021-06-05 21:59:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:32,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337628401] [2021-06-05 21:59:32,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337628401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079853736] [2021-06-05 21:59:32,077 INFO L93 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 21:59:32,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:32,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:32,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:32,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079853736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:32,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:32,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:32,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8320653] [2021-06-05 21:59:32,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:32,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:32,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:32,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:32,251 INFO L87 Difference]: Start difference. First operand 335 states and 1066 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 21:59:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:32,585 INFO L93 Difference]: Finished difference Result 506 states and 1499 transitions. [2021-06-05 21:59:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:59:32,585 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 21:59:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:32,587 INFO L225 Difference]: With dead ends: 506 [2021-06-05 21:59:32,588 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 21:59:32,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:59:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 21:59:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 332. [2021-06-05 21:59:32,595 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 21:59:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1055 transitions. [2021-06-05 21:59:32,596 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1055 transitions. Word has length 20 [2021-06-05 21:59:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:32,596 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1055 transitions. [2021-06-05 21:59:32,597 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 21:59:32,597 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1055 transitions. [2021-06-05 21:59:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:32,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:32,598 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:32,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 21:59:32,822 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1566650011, now seen corresponding path program 19 times [2021-06-05 21:59:32,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:32,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596079077] [2021-06-05 21:59:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:32,887 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 21:59:32,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:32,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596079077] [2021-06-05 21:59:32,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596079077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:32,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374961223] [2021-06-05 21:59:32,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:59:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:33,048 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 21:59:33,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374961223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:33,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:33,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317383908] [2021-06-05 21:59:33,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:33,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:33,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:33,050 INFO L87 Difference]: Start difference. First operand 332 states and 1055 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 21:59:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:33,373 INFO L93 Difference]: Finished difference Result 464 states and 1404 transitions. [2021-06-05 21:59:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:33,374 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 21:59:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:33,376 INFO L225 Difference]: With dead ends: 464 [2021-06-05 21:59:33,376 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 21:59:33,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 21:59:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 332. [2021-06-05 21:59:33,382 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 21:59:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1052 transitions. [2021-06-05 21:59:33,383 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1052 transitions. Word has length 20 [2021-06-05 21:59:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:33,383 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1052 transitions. [2021-06-05 21:59:33,383 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 21:59:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1052 transitions. [2021-06-05 21:59:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:33,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:33,384 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:33,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:33,605 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1636903875, now seen corresponding path program 20 times [2021-06-05 21:59:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:33,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492081061] [2021-06-05 21:59:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:33,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492081061] [2021-06-05 21:59:33,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492081061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858543397] [2021-06-05 21:59:33,692 INFO L93 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 21:59:33,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:33,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858543397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:33,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:33,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:33,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742635980] [2021-06-05 21:59:33,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:33,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:33,893 INFO L87 Difference]: Start difference. First operand 332 states and 1052 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 21:59:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:34,176 INFO L93 Difference]: Finished difference Result 554 states and 1629 transitions. [2021-06-05 21:59:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:34,176 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 21:59:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:34,178 INFO L225 Difference]: With dead ends: 554 [2021-06-05 21:59:34,178 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 21:59:34,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 21:59:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 341. [2021-06-05 21:59:34,185 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 21:59:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1085 transitions. [2021-06-05 21:59:34,186 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1085 transitions. Word has length 20 [2021-06-05 21:59:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:34,186 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1085 transitions. [2021-06-05 21:59:34,186 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 21:59:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1085 transitions. [2021-06-05 21:59:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:34,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:34,187 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:34,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:34,393 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash 142996153, now seen corresponding path program 21 times [2021-06-05 21:59:34,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:34,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019024614] [2021-06-05 21:59:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:34,463 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 21:59:34,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:34,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019024614] [2021-06-05 21:59:34,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019024614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:34,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451198678] [2021-06-05 21:59:34,464 INFO L93 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 21:59:34,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:34,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451198678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:34,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:34,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912795010] [2021-06-05 21:59:34,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:34,624 INFO L87 Difference]: Start difference. First operand 341 states and 1085 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 21:59:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:34,994 INFO L93 Difference]: Finished difference Result 560 states and 1636 transitions. [2021-06-05 21:59:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:59:34,994 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 21:59:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:34,996 INFO L225 Difference]: With dead ends: 560 [2021-06-05 21:59:34,996 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 21:59:34,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 388.4ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:59:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 21:59:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 338. [2021-06-05 21:59:35,004 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 21:59:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1074 transitions. [2021-06-05 21:59:35,005 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1074 transitions. Word has length 20 [2021-06-05 21:59:35,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:35,005 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1074 transitions. [2021-06-05 21:59:35,005 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 21:59:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1074 transitions. [2021-06-05 21:59:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:35,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:35,007 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:35,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 21:59:35,229 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash 680851731, now seen corresponding path program 22 times [2021-06-05 21:59:35,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:35,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747017748] [2021-06-05 21:59:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:35,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:35,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747017748] [2021-06-05 21:59:35,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747017748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:35,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384877170] [2021-06-05 21:59:35,294 INFO L93 rtionOrderModulation]: Changing 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 21:59:35,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:35,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:35,460 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 21:59:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384877170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:35,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:35,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:35,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593859458] [2021-06-05 21:59:35,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:35,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:35,461 INFO L87 Difference]: Start difference. First operand 338 states and 1074 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 21:59:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:35,760 INFO L93 Difference]: Finished difference Result 524 states and 1554 transitions. [2021-06-05 21:59:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:35,760 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 21:59:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:35,762 INFO L225 Difference]: With dead ends: 524 [2021-06-05 21:59:35,762 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 21:59:35,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 21:59:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 335. [2021-06-05 21:59:35,768 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 21:59:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1063 transitions. [2021-06-05 21:59:35,769 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1063 transitions. Word has length 20 [2021-06-05 21:59:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:35,769 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1063 transitions. [2021-06-05 21:59:35,769 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 21:59:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1063 transitions. [2021-06-05 21:59:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:35,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:35,770 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:35,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:35,993 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1268597053, now seen corresponding path program 23 times [2021-06-05 21:59:35,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:35,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979461555] [2021-06-05 21:59:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:36,058 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 21:59:36,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979461555] [2021-06-05 21:59:36,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979461555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583174747] [2021-06-05 21:59:36,059 INFO L93 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 21:59:36,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:36,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583174747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:36,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 21:59:36,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964267929] [2021-06-05 21:59:36,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:59:36,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:59:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:59:36,208 INFO L87 Difference]: Start difference. First operand 335 states and 1063 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 21:59:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:36,495 INFO L93 Difference]: Finished difference Result 515 states and 1530 transitions. [2021-06-05 21:59:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:36,495 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 21:59:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:36,497 INFO L225 Difference]: With dead ends: 515 [2021-06-05 21:59:36,497 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 21:59:36,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 21:59:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 335. [2021-06-05 21:59:36,503 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 21:59:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 21:59:36,504 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 21:59:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:36,504 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 21:59:36,504 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 21:59:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 21:59:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:36,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:36,505 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:36,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 21:59:36,721 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash 183038878, now seen corresponding path program 24 times [2021-06-05 21:59:36,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:36,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155858224] [2021-06-05 21:59:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:36,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155858224] [2021-06-05 21:59:36,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155858224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124014762] [2021-06-05 21:59:36,775 INFO L93 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 21:59:36,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:36,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:36,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:36,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,887 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 13 treesize of output 9 [2021-06-05 21:59:36,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,902 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 21:59:36,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:36,902 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 21:59:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124014762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:36,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 21:59:36,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507261670] [2021-06-05 21:59:36,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:36,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:36,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:36,949 INFO L87 Difference]: Start difference. First operand 335 states and 1060 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 21:59:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:37,198 INFO L93 Difference]: Finished difference Result 487 states and 1495 transitions. [2021-06-05 21:59:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:37,198 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 21:59:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:37,200 INFO L225 Difference]: With dead ends: 487 [2021-06-05 21:59:37,200 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 21:59:37,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 21:59:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-06-05 21:59:37,205 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 21:59:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 21:59:37,206 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 21:59:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:37,206 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 21:59:37,206 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 21:59:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 21:59:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:37,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:37,207 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:37,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:37,425 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1408897859, now seen corresponding path program 25 times [2021-06-05 21:59:37,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:37,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790170594] [2021-06-05 21:59:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:37,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:37,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790170594] [2021-06-05 21:59:37,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790170594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:37,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115110376] [2021-06-05 21:59:37,494 INFO 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 21:59:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:37,640 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 12 treesize of output 8 [2021-06-05 21:59:37,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:37,648 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 21:59:37,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:37,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 21:59:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:37,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115110376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:37,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:37,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:37,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262075708] [2021-06-05 21:59:37,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:37,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:37,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:37,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:37,682 INFO L87 Difference]: Start difference. First operand 335 states and 1060 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 21:59:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:37,893 INFO L93 Difference]: Finished difference Result 542 states and 1611 transitions. [2021-06-05 21:59:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:37,894 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 21:59:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:37,896 INFO L225 Difference]: With dead ends: 542 [2021-06-05 21:59:37,896 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 21:59:37,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 21:59:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 345. [2021-06-05 21:59:37,902 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 21:59:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1086 transitions. [2021-06-05 21:59:37,903 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1086 transitions. Word has length 20 [2021-06-05 21:59:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:37,903 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1086 transitions. [2021-06-05 21:59:37,903 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 21:59:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1086 transitions. [2021-06-05 21:59:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:37,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:37,904 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:38,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 21:59:38,117 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1727425907, now seen corresponding path program 26 times [2021-06-05 21:59:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:38,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551840477] [2021-06-05 21:59:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:38,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551840477] [2021-06-05 21:59:38,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551840477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939413651] [2021-06-05 21:59:38,183 INFO L93 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 21:59:38,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:38,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:38,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:38,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,357 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 21:59:38,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:38,357 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 21:59:38,383 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 21:59:38,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939413651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:38,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:38,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297824445] [2021-06-05 21:59:38,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:38,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:38,384 INFO L87 Difference]: Start difference. First operand 345 states and 1086 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 21:59:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:38,614 INFO L93 Difference]: Finished difference Result 594 states and 1732 transitions. [2021-06-05 21:59:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:38,614 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 21:59:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:38,616 INFO L225 Difference]: With dead ends: 594 [2021-06-05 21:59:38,616 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 21:59:38,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 21:59:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 348. [2021-06-05 21:59:38,623 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 21:59:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1097 transitions. [2021-06-05 21:59:38,623 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1097 transitions. Word has length 20 [2021-06-05 21:59:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:38,624 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1097 transitions. [2021-06-05 21:59:38,624 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 21:59:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1097 transitions. [2021-06-05 21:59:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:38,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:38,625 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:38,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:38,837 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1073633667, now seen corresponding path program 27 times [2021-06-05 21:59:38,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:38,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862215191] [2021-06-05 21:59:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:38,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862215191] [2021-06-05 21:59:38,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862215191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764169770] [2021-06-05 21:59:38,905 INFO L93 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 21:59:38,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:38,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:39,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:39,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,075 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 21:59:39,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,083 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 21:59:39,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:39,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 21:59:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:39,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764169770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:39,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:39,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:39,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307343855] [2021-06-05 21:59:39,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:39,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:39,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:39,111 INFO L87 Difference]: Start difference. First operand 348 states and 1097 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 21:59:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:39,298 INFO L93 Difference]: Finished difference Result 551 states and 1629 transitions. [2021-06-05 21:59:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:39,298 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 21:59:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:39,300 INFO L225 Difference]: With dead ends: 551 [2021-06-05 21:59:39,300 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 21:59:39,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 21:59:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 340. [2021-06-05 21:59:39,305 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 21:59:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1073 transitions. [2021-06-05 21:59:39,306 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1073 transitions. Word has length 20 [2021-06-05 21:59:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:39,306 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1073 transitions. [2021-06-05 21:59:39,307 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 21:59:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1073 transitions. [2021-06-05 21:59:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:39,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:39,307 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:39,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 21:59:39,517 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash -633334319, now seen corresponding path program 28 times [2021-06-05 21:59:39,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:39,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037189015] [2021-06-05 21:59:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:39,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:39,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037189015] [2021-06-05 21:59:39,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037189015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:39,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696471077] [2021-06-05 21:59:39,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:59:39,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:39,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:39,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:39,797 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 21:59:39,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696471077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:39,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:39,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:39,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060406258] [2021-06-05 21:59:39,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:39,798 INFO L87 Difference]: Start difference. First operand 340 states and 1073 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 21:59:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:40,011 INFO L93 Difference]: Finished difference Result 520 states and 1545 transitions. [2021-06-05 21:59:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:40,011 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 21:59:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:40,013 INFO L225 Difference]: With dead ends: 520 [2021-06-05 21:59:40,013 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 21:59:40,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 21:59:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2021-06-05 21:59:40,021 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 21:59:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1095 transitions. [2021-06-05 21:59:40,022 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1095 transitions. Word has length 20 [2021-06-05 21:59:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:40,022 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1095 transitions. [2021-06-05 21:59:40,022 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 21:59:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1095 transitions. [2021-06-05 21:59:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:40,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:40,023 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:40,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:40,236 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2127242041, now seen corresponding path program 29 times [2021-06-05 21:59:40,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:40,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14184723] [2021-06-05 21:59:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:40,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:40,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14184723] [2021-06-05 21:59:40,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14184723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:40,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890015747] [2021-06-05 21:59:40,301 INFO L93 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 21:59:40,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:40,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:40,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:40,508 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 21:59:40,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890015747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:40,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:40,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:40,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995609680] [2021-06-05 21:59:40,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:40,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:40,509 INFO L87 Difference]: Start difference. First operand 346 states and 1095 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 21:59:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:40,811 INFO L93 Difference]: Finished difference Result 526 states and 1552 transitions. [2021-06-05 21:59:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:59:40,811 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 21:59:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:40,813 INFO L225 Difference]: With dead ends: 526 [2021-06-05 21:59:40,813 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 21:59:40,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:59:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 21:59:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2021-06-05 21:59:40,819 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 21:59:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1084 transitions. [2021-06-05 21:59:40,820 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1084 transitions. Word has length 20 [2021-06-05 21:59:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:40,821 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1084 transitions. [2021-06-05 21:59:40,821 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 21:59:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1084 transitions. [2021-06-05 21:59:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:40,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:40,822 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:41,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 21:59:41,037 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1589386463, now seen corresponding path program 30 times [2021-06-05 21:59:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:41,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79632649] [2021-06-05 21:59:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:41,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:41,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79632649] [2021-06-05 21:59:41,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79632649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:41,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718615355] [2021-06-05 21:59:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:59:41,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:41,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:41,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:41,295 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 21:59:41,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718615355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:41,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:41,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:41,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674855600] [2021-06-05 21:59:41,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:41,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:41,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:41,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:41,296 INFO L87 Difference]: Start difference. First operand 343 states and 1084 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 21:59:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:41,550 INFO L93 Difference]: Finished difference Result 484 states and 1457 transitions. [2021-06-05 21:59:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:41,550 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 21:59:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:41,552 INFO L225 Difference]: With dead ends: 484 [2021-06-05 21:59:41,552 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 21:59:41,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 21:59:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 335. [2021-06-05 21:59:41,558 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 21:59:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 21:59:41,559 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 21:59:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:41,559 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 21:59:41,559 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 21:59:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 21:59:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:41,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:41,560 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:41,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 21:59:41,782 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:41,783 INFO L82 PathProgramCache]: Analyzing trace with hash 940837886, now seen corresponding path program 31 times [2021-06-05 21:59:41,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:41,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085282501] [2021-06-05 21:59:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:41,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085282501] [2021-06-05 21:59:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085282501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581941875] [2021-06-05 21:59:41,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:59:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:41,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:41,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,971 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 21:59:41,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:41,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:41,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:42,002 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 21:59:42,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:42,003 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-06-05 21:59:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:42,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581941875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:42,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:42,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 21:59:42,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902021066] [2021-06-05 21:59:42,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:42,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:42,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:42,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:42,069 INFO L87 Difference]: Start difference. First operand 335 states and 1060 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 21:59:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:42,334 INFO L93 Difference]: Finished difference Result 528 states and 1594 transitions. [2021-06-05 21:59:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:42,335 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 21:59:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:42,336 INFO L225 Difference]: With dead ends: 528 [2021-06-05 21:59:42,336 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 21:59:42,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 21:59:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 340. [2021-06-05 21:59:42,352 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 21:59:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1085 transitions. [2021-06-05 21:59:42,353 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1085 transitions. Word has length 20 [2021-06-05 21:59:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:42,353 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1085 transitions. [2021-06-05 21:59:42,353 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 21:59:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1085 transitions. [2021-06-05 21:59:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:42,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:42,354 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:42,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:42,568 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1950213049, now seen corresponding path program 32 times [2021-06-05 21:59:42,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:42,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202158129] [2021-06-05 21:59:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:42,659 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 21:59:42,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202158129] [2021-06-05 21:59:42,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202158129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916991426] [2021-06-05 21:59:42,660 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 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 21:59:42,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:42,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:42,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:42,782 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 5 treesize of output 3 [2021-06-05 21:59:42,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:42,833 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.4 percent of original size [2021-06-05 21:59:42,836 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 6 treesize of output 4 [2021-06-05 21:59:42,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:42,874 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-06-05 21:59:42,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:42,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:42,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:42,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:42,898 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 21:59:42,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:42,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:61, output treesize:20 [2021-06-05 21:59:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:42,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916991426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:42,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:42,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:42,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143833945] [2021-06-05 21:59:42,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:42,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:42,956 INFO L87 Difference]: Start difference. First operand 340 states and 1085 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 21:59:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:43,422 INFO L93 Difference]: Finished difference Result 649 states and 1911 transitions. [2021-06-05 21:59:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:43,423 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 21:59:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:43,425 INFO L225 Difference]: With dead ends: 649 [2021-06-05 21:59:43,425 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 21:59:43,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:59:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 21:59:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 352. [2021-06-05 21:59:43,435 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 21:59:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1126 transitions. [2021-06-05 21:59:43,436 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1126 transitions. Word has length 20 [2021-06-05 21:59:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:43,436 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1126 transitions. [2021-06-05 21:59:43,436 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 21:59:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1126 transitions. [2021-06-05 21:59:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:43,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:43,437 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:43,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:43,637 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1186110717, now seen corresponding path program 33 times [2021-06-05 21:59:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:43,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217105577] [2021-06-05 21:59:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:43,700 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 21:59:43,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:43,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217105577] [2021-06-05 21:59:43,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217105577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:43,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691763772] [2021-06-05 21:59:43,700 INFO L93 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 21:59:43,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:43,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:43,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:43,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:43,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:43,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:43,869 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 21:59:43,871 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 13 treesize of output 9 [2021-06-05 21:59:43,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:43,874 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 21:59:43,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:43,897 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 21:59:43,897 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 21:59:43,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:43,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 21:59:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:43,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691763772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:43,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:43,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:43,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772929611] [2021-06-05 21:59:43,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:43,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:43,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:43,945 INFO L87 Difference]: Start difference. First operand 352 states and 1126 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 21:59:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:44,265 INFO L93 Difference]: Finished difference Result 701 states and 2032 transitions. [2021-06-05 21:59:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:44,266 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 21:59:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:44,268 INFO L225 Difference]: With dead ends: 701 [2021-06-05 21:59:44,268 INFO L226 Difference]: Without dead ends: 701 [2021-06-05 21:59:44,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-05 21:59:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 358. [2021-06-05 21:59:44,276 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 21:59:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1151 transitions. [2021-06-05 21:59:44,277 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1151 transitions. Word has length 20 [2021-06-05 21:59:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:44,277 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1151 transitions. [2021-06-05 21:59:44,277 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 21:59:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1151 transitions. [2021-06-05 21:59:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:44,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:44,278 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:44,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:44,485 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1614948857, now seen corresponding path program 34 times [2021-06-05 21:59:44,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:44,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255792260] [2021-06-05 21:59:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:44,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:44,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255792260] [2021-06-05 21:59:44,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255792260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455394585] [2021-06-05 21:59:44,552 INFO L93 rtionOrderModulation]: Changing 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 21:59:44,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:44,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:44,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:44,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:44,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:44,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,702 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 21:59:44,705 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 12 treesize of output 8 [2021-06-05 21:59:44,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:44,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:44,717 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 21:59:44,769 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 21:59:44,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455394585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:44,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:59:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645008248] [2021-06-05 21:59:44,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:59:44,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:59:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:59:44,771 INFO L87 Difference]: Start difference. First operand 358 states and 1151 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 21:59:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:45,037 INFO L93 Difference]: Finished difference Result 658 states and 1923 transitions. [2021-06-05 21:59:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:45,037 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 21:59:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:45,039 INFO L225 Difference]: With dead ends: 658 [2021-06-05 21:59:45,039 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 21:59:45,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 21:59:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 356. [2021-06-05 21:59:45,044 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 21:59:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1140 transitions. [2021-06-05 21:59:45,045 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1140 transitions. Word has length 20 [2021-06-05 21:59:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:45,045 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1140 transitions. [2021-06-05 21:59:45,045 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 21:59:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1140 transitions. [2021-06-05 21:59:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:45,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:45,046 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:45,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:45,246 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:45,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:45,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1934241762, now seen corresponding path program 35 times [2021-06-05 21:59:45,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:45,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158283493] [2021-06-05 21:59:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:45,297 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 21:59:45,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:45,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158283493] [2021-06-05 21:59:45,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158283493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:45,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755557040] [2021-06-05 21:59:45,298 INFO L93 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 21:59:45,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:45,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:45,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:45,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:45,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:45,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:45,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:45,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:45,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:45,432 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 21:59:45,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:45,433 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 21:59:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:45,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755557040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:45,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:45,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 21:59:45,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022172960] [2021-06-05 21:59:45,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:45,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:45,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:45,492 INFO L87 Difference]: Start difference. First operand 356 states and 1140 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 21:59:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:45,781 INFO L93 Difference]: Finished difference Result 461 states and 1410 transitions. [2021-06-05 21:59:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:45,781 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 21:59:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:45,782 INFO L225 Difference]: With dead ends: 461 [2021-06-05 21:59:45,782 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 21:59:45,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 21:59:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 347. [2021-06-05 21:59:45,786 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 21:59:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1099 transitions. [2021-06-05 21:59:45,787 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1099 transitions. Word has length 20 [2021-06-05 21:59:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:45,787 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1099 transitions. [2021-06-05 21:59:45,787 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 21:59:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1099 transitions. [2021-06-05 21:59:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:45,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:45,787 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:45,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 21:59:45,993 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -526177149, now seen corresponding path program 36 times [2021-06-05 21:59:45,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:45,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533007079] [2021-06-05 21:59:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:46,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:46,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533007079] [2021-06-05 21:59:46,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533007079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:46,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839875462] [2021-06-05 21:59:46,067 INFO L93 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 21:59:46,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:46,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:46,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:46,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:46,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:46,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:46,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:46,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:46,233 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 21:59:46,235 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 21:59:46,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:46,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:46,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:46,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 21:59:46,304 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 21:59:46,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839875462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:46,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:46,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:46,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544684327] [2021-06-05 21:59:46,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:46,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:46,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:46,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:46,305 INFO L87 Difference]: Start difference. First operand 347 states and 1099 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 21:59:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:46,574 INFO L93 Difference]: Finished difference Result 602 states and 1789 transitions. [2021-06-05 21:59:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:46,574 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 21:59:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:46,575 INFO L225 Difference]: With dead ends: 602 [2021-06-05 21:59:46,575 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 21:59:46,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 21:59:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 337. [2021-06-05 21:59:46,580 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 21:59:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1068 transitions. [2021-06-05 21:59:46,580 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1068 transitions. Word has length 20 [2021-06-05 21:59:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:46,580 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1068 transitions. [2021-06-05 21:59:46,580 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 21:59:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1068 transitions. [2021-06-05 21:59:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:46,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:46,581 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:46,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:46,790 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:46,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1106874243, now seen corresponding path program 37 times [2021-06-05 21:59:46,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:46,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864713074] [2021-06-05 21:59:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:46,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864713074] [2021-06-05 21:59:46,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864713074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489301281] [2021-06-05 21:59:46,863 INFO 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 21:59:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:46,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:46,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:46,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:47,036 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 21:59:47,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:47,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:47,043 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 12 treesize of output 8 [2021-06-05 21:59:47,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:47,068 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 21:59:47,068 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 21:59:47,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:47,069 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 21:59:47,147 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 21:59:47,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489301281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:47,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:47,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:47,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998438389] [2021-06-05 21:59:47,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:47,148 INFO L87 Difference]: Start difference. First operand 337 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 21:59:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:47,577 INFO L93 Difference]: Finished difference Result 598 states and 1773 transitions. [2021-06-05 21:59:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:47,578 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 21:59:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:47,579 INFO L225 Difference]: With dead ends: 598 [2021-06-05 21:59:47,579 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 21:59:47,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:59:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 21:59:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 340. [2021-06-05 21:59:47,584 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 21:59:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-06-05 21:59:47,584 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-06-05 21:59:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:47,584 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-06-05 21:59:47,584 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 21:59:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-06-05 21:59:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:47,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:47,585 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:47,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:47,789 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash -850262713, now seen corresponding path program 38 times [2021-06-05 21:59:47,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:47,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950678396] [2021-06-05 21:59:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:47,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:47,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950678396] [2021-06-05 21:59:47,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950678396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:47,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794292712] [2021-06-05 21:59:47,860 INFO L93 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 21:59:47,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:47,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:47,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:48,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:48,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,040 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-06-05 21:59:48,042 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 21:59:48,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:48,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:48,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,083 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 21:59:48,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:48,084 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 21:59:48,168 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 21:59:48,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794292712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:48,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:48,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469887747] [2021-06-05 21:59:48,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:48,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:48,169 INFO L87 Difference]: Start difference. First operand 340 states and 1083 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 21:59:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:48,493 INFO L93 Difference]: Finished difference Result 536 states and 1630 transitions. [2021-06-05 21:59:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:48,493 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 21:59:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:48,494 INFO L225 Difference]: With dead ends: 536 [2021-06-05 21:59:48,494 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 21:59:48,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 21:59:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 340. [2021-06-05 21:59:48,500 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 21:59:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-06-05 21:59:48,500 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-06-05 21:59:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:48,500 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-06-05 21:59:48,500 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 21:59:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-06-05 21:59:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:48,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:48,501 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:48,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:48,702 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash 438687377, now seen corresponding path program 39 times [2021-06-05 21:59:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:48,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709280286] [2021-06-05 21:59:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:48,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709280286] [2021-06-05 21:59:48,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709280286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032030737] [2021-06-05 21:59:48,779 INFO L93 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 21:59:48,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:48,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:48,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:48,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:48,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,982 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 21:59:48,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:48,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,007 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-06-05 21:59:49,008 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 21:59:49,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:49,008 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 21:59:49,087 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 21:59:49,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032030737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:49,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:49,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593777367] [2021-06-05 21:59:49,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:49,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:49,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:49,088 INFO L87 Difference]: Start difference. First operand 340 states and 1083 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 21:59:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:49,422 INFO L93 Difference]: Finished difference Result 646 states and 1914 transitions. [2021-06-05 21:59:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:49,422 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 21:59:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:49,423 INFO L225 Difference]: With dead ends: 646 [2021-06-05 21:59:49,423 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 21:59:49,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 21:59:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 348. [2021-06-05 21:59:49,428 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 21:59:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1119 transitions. [2021-06-05 21:59:49,429 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1119 transitions. Word has length 20 [2021-06-05 21:59:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:49,429 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1119 transitions. [2021-06-05 21:59:49,429 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 21:59:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1119 transitions. [2021-06-05 21:59:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:49,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:49,430 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:49,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 21:59:49,630 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1055220345, now seen corresponding path program 40 times [2021-06-05 21:59:49,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:49,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232102951] [2021-06-05 21:59:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:49,698 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 21:59:49,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:49,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232102951] [2021-06-05 21:59:49,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232102951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393771867] [2021-06-05 21:59:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:59:49,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:49,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:49,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,819 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 13 treesize of output 9 [2021-06-05 21:59:49,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,822 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 12 treesize of output 8 [2021-06-05 21:59:49,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,825 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 21:59:49,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,859 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-06-05 21:59:49,861 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 6 treesize of output 4 [2021-06-05 21:59:49,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,882 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 21:59:49,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:49,883 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:90, output treesize:20 [2021-06-05 21:59:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:49,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393771867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:49,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:49,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728883007] [2021-06-05 21:59:49,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:49,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:49,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:49,962 INFO L87 Difference]: Start difference. First operand 348 states and 1119 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 21:59:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:50,277 INFO L93 Difference]: Finished difference Result 632 states and 1863 transitions. [2021-06-05 21:59:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:50,277 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 21:59:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:50,278 INFO L225 Difference]: With dead ends: 632 [2021-06-05 21:59:50,278 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 21:59:50,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 21:59:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 351. [2021-06-05 21:59:50,283 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 21:59:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1121 transitions. [2021-06-05 21:59:50,284 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1121 transitions. Word has length 20 [2021-06-05 21:59:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:50,284 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1121 transitions. [2021-06-05 21:59:50,284 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 21:59:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1121 transitions. [2021-06-05 21:59:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:50,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:50,285 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:50,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:50,489 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1190087815, now seen corresponding path program 41 times [2021-06-05 21:59:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:50,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329068802] [2021-06-05 21:59:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:50,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:50,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329068802] [2021-06-05 21:59:50,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329068802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848920438] [2021-06-05 21:59:50,562 INFO L93 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 21:59:50,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:50,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:50,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:50,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,735 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-06-05 21:59:50,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:50,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:50,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,774 INFO L628 ElimStorePlain]: treesize reduction 10, result has 77.3 percent of original size [2021-06-05 21:59:50,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:50,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,798 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 21:59:50,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:50,798 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 21:59:50,900 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 21:59:50,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848920438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:50,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:50,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:50,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928560407] [2021-06-05 21:59:50,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:50,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:50,901 INFO L87 Difference]: Start difference. First operand 351 states and 1121 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 21:59:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:51,370 INFO L93 Difference]: Finished difference Result 677 states and 1978 transitions. [2021-06-05 21:59:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:51,370 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 21:59:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:51,371 INFO L225 Difference]: With dead ends: 677 [2021-06-05 21:59:51,372 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 21:59:51,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:59:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 21:59:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 344. [2021-06-05 21:59:51,376 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 21:59:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1103 transitions. [2021-06-05 21:59:51,377 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1103 transitions. Word has length 20 [2021-06-05 21:59:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:51,377 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1103 transitions. [2021-06-05 21:59:51,377 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 21:59:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1103 transitions. [2021-06-05 21:59:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:51,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:51,378 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:51,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:51,579 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:51,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1812537081, now seen corresponding path program 42 times [2021-06-05 21:59:51,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:51,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100784968] [2021-06-05 21:59:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:51,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:51,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100784968] [2021-06-05 21:59:51,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100784968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:51,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626302834] [2021-06-05 21:59:51,654 INFO L93 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 21:59:51,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:51,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:51,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:51,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:51,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,836 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 21:59:51,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,868 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 21:59:51,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:51,869 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 21:59:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:51,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626302834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:51,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:51,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:51,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881231534] [2021-06-05 21:59:51,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:51,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:51,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:51,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:51,950 INFO L87 Difference]: Start difference. First operand 344 states and 1103 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 21:59:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:52,256 INFO L93 Difference]: Finished difference Result 611 states and 1830 transitions. [2021-06-05 21:59:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:52,256 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 21:59:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:52,257 INFO L225 Difference]: With dead ends: 611 [2021-06-05 21:59:52,257 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 21:59:52,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 21:59:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 341. [2021-06-05 21:59:52,262 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 21:59:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1088 transitions. [2021-06-05 21:59:52,263 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1088 transitions. Word has length 20 [2021-06-05 21:59:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:52,263 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1088 transitions. [2021-06-05 21:59:52,263 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 21:59:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1088 transitions. [2021-06-05 21:59:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:52,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:52,263 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:52,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:52,464 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1210824343, now seen corresponding path program 43 times [2021-06-05 21:59:52,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:52,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147335535] [2021-06-05 21:59:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:52,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:52,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147335535] [2021-06-05 21:59:52,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147335535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:52,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662872813] [2021-06-05 21:59:52,534 INFO 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 21:59:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:52,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:52,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:52,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:52,653 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 12 treesize of output 8 [2021-06-05 21:59:52,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:52,698 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-06-05 21:59:52,700 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 21:59:52,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:52,730 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-06-05 21:59:52,732 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 13 treesize of output 9 [2021-06-05 21:59:52,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:52,751 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 21:59:52,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:52,752 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 21:59:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662872813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:52,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:52,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256227410] [2021-06-05 21:59:52,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:52,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:52,833 INFO L87 Difference]: Start difference. First operand 341 states and 1088 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 21:59:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:53,295 INFO L93 Difference]: Finished difference Result 583 states and 1732 transitions. [2021-06-05 21:59:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:53,296 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 21:59:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:53,296 INFO L225 Difference]: With dead ends: 583 [2021-06-05 21:59:53,297 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 21:59:53,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:59:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 21:59:53,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 351. [2021-06-05 21:59:53,301 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 21:59:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1115 transitions. [2021-06-05 21:59:53,302 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1115 transitions. Word has length 20 [2021-06-05 21:59:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:53,302 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1115 transitions. [2021-06-05 21:59:53,302 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 21:59:53,302 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1115 transitions. [2021-06-05 21:59:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:53,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:53,302 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:53,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:53,503 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash -704599583, now seen corresponding path program 44 times [2021-06-05 21:59:53,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:53,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253983582] [2021-06-05 21:59:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:53,569 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 21:59:53,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:53,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253983582] [2021-06-05 21:59:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253983582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:53,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578111875] [2021-06-05 21:59:53,569 INFO L93 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 21:59:53,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:53,690 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 13 treesize of output 9 [2021-06-05 21:59:53,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,694 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 21:59:53,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,738 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 21:59:53,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 21:59:53,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,764 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-06-05 21:59:53,764 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 21:59:53,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:53,764 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 21:59:53,851 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 21:59:53,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578111875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:53,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:53,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:53,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793493027] [2021-06-05 21:59:53,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:53,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:53,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:53,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:53,852 INFO L87 Difference]: Start difference. First operand 351 states and 1115 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 21:59:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:54,132 INFO L93 Difference]: Finished difference Result 554 states and 1678 transitions. [2021-06-05 21:59:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:54,133 INFO L225 Difference]: With dead ends: 554 [2021-06-05 21:59:54,133 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 21:59:54,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 21:59:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 343. [2021-06-05 21:59:54,137 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 21:59:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1093 transitions. [2021-06-05 21:59:54,138 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1093 transitions. Word has length 20 [2021-06-05 21:59:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:54,138 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1093 transitions. [2021-06-05 21:59:54,138 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 21:59:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1093 transitions. [2021-06-05 21:59:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:54,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:54,139 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:54,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-05 21:59:54,339 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1804200957, now seen corresponding path program 45 times [2021-06-05 21:59:54,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:54,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400973664] [2021-06-05 21:59:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:54,414 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 21:59:54,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:54,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400973664] [2021-06-05 21:59:54,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400973664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:54,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546015944] [2021-06-05 21:59:54,414 INFO L93 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 21:59:54,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:54,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:54,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:54,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546015944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:54,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:54,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649858585] [2021-06-05 21:59:54,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:54,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:54,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:54,667 INFO L87 Difference]: Start difference. First operand 343 states and 1093 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 21:59:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:54,963 INFO L93 Difference]: Finished difference Result 531 states and 1604 transitions. [2021-06-05 21:59:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:54,963 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 21:59:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:54,964 INFO L225 Difference]: With dead ends: 531 [2021-06-05 21:59:54,964 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 21:59:54,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 21:59:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 350. [2021-06-05 21:59:54,969 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 21:59:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1120 transitions. [2021-06-05 21:59:54,970 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1120 transitions. Word has length 20 [2021-06-05 21:59:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:54,970 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1120 transitions. [2021-06-05 21:59:54,970 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 21:59:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1120 transitions. [2021-06-05 21:59:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:54,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:54,971 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:55,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:55,171 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:55,172 INFO L82 PathProgramCache]: Analyzing trace with hash 996858617, now seen corresponding path program 46 times [2021-06-05 21:59:55,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:55,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248679944] [2021-06-05 21:59:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:55,237 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 21:59:55,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:55,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248679944] [2021-06-05 21:59:55,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248679944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:55,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824489030] [2021-06-05 21:59:55,238 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 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 21:59:55,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:55,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:55,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:55,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:55,477 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 21:59:55,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824489030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:55,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:55,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:55,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894441860] [2021-06-05 21:59:55,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:55,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:55,479 INFO L87 Difference]: Start difference. First operand 350 states and 1120 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 21:59:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:55,835 INFO L93 Difference]: Finished difference Result 537 states and 1611 transitions. [2021-06-05 21:59:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:59:55,835 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 21:59:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:55,836 INFO L225 Difference]: With dead ends: 537 [2021-06-05 21:59:55,836 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 21:59:55,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:59:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 21:59:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 347. [2021-06-05 21:59:55,841 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 21:59:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1109 transitions. [2021-06-05 21:59:55,841 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1109 transitions. Word has length 20 [2021-06-05 21:59:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:55,842 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1109 transitions. [2021-06-05 21:59:55,842 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 21:59:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1109 transitions. [2021-06-05 21:59:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:55,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:55,842 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:56,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 21:59:56,043 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:56,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1534714195, now seen corresponding path program 47 times [2021-06-05 21:59:56,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:56,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995218155] [2021-06-05 21:59:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:56,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:56,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995218155] [2021-06-05 21:59:56,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995218155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:56,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178504594] [2021-06-05 21:59:56,114 INFO L93 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 21:59:56,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:56,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:56,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:56,315 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 21:59:56,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178504594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:56,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:56,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658318608] [2021-06-05 21:59:56,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:56,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:56,316 INFO L87 Difference]: Start difference. First operand 347 states and 1109 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 21:59:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:56,653 INFO L93 Difference]: Finished difference Result 501 states and 1529 transitions. [2021-06-05 21:59:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:56,653 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 21:59:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:56,654 INFO L225 Difference]: With dead ends: 501 [2021-06-05 21:59:56,654 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 21:59:56,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:59:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 21:59:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 344. [2021-06-05 21:59:56,658 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 21:59:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-06-05 21:59:56,659 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-06-05 21:59:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:56,659 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-06-05 21:59:56,659 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 21:59:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-06-05 21:59:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:56,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:56,659 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:56,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:56,860 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash 14376141, now seen corresponding path program 48 times [2021-06-05 21:59:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:56,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279689698] [2021-06-05 21:59:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:56,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279689698] [2021-06-05 21:59:56,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279689698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128671872] [2021-06-05 21:59:56,929 INFO L93 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 21:59:56,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:56,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:57,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128671872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:57,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:57,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:57,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172964949] [2021-06-05 21:59:57,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:57,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:57,175 INFO L87 Difference]: Start difference. First operand 344 states and 1098 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 21:59:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:57,654 INFO L93 Difference]: Finished difference Result 615 states and 1814 transitions. [2021-06-05 21:59:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:57,656 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 21:59:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:57,657 INFO L225 Difference]: With dead ends: 615 [2021-06-05 21:59:57,657 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 21:59:57,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:59:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 21:59:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 352. [2021-06-05 21:59:57,662 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 21:59:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1134 transitions. [2021-06-05 21:59:57,663 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1134 transitions. Word has length 20 [2021-06-05 21:59:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:57,663 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1134 transitions. [2021-06-05 21:59:57,663 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 21:59:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1134 transitions. [2021-06-05 21:59:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:57,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:57,664 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:57,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:57,864 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:57,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:57,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1479531581, now seen corresponding path program 49 times [2021-06-05 21:59:57,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:57,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617510854] [2021-06-05 21:59:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:57,953 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 21:59:57,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617510854] [2021-06-05 21:59:57,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617510854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750916266] [2021-06-05 21:59:57,954 INFO 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 21:59:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:58,202 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 21:59:58,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750916266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:58,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:58,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:58,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616676733] [2021-06-05 21:59:58,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:58,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:58,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:58,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:58,203 INFO L87 Difference]: Start difference. First operand 352 states and 1134 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 21:59:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:58,756 INFO L93 Difference]: Finished difference Result 621 states and 1815 transitions. [2021-06-05 21:59:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:59:58,756 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 21:59:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:58,761 INFO L225 Difference]: With dead ends: 621 [2021-06-05 21:59:58,761 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 21:59:58,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 588.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:59:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 21:59:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 355. [2021-06-05 21:59:58,768 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 21:59:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1136 transitions. [2021-06-05 21:59:58,769 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1136 transitions. Word has length 20 [2021-06-05 21:59:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:58,769 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1136 transitions. [2021-06-05 21:59:58,769 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 21:59:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1136 transitions. [2021-06-05 21:59:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:58,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:58,770 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:58,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:58,993 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 765776579, now seen corresponding path program 50 times [2021-06-05 21:59:58,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:58,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591900453] [2021-06-05 21:59:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:59,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:59,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591900453] [2021-06-05 21:59:59,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591900453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:59,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370101383] [2021-06-05 21:59:59,071 INFO L93 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 21:59:59,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:59:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:59,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370101383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:59,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:59,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:59:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994182298] [2021-06-05 21:59:59,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:59:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:59:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:59:59,340 INFO L87 Difference]: Start difference. First operand 355 states and 1136 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 21:59:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:59,726 INFO L93 Difference]: Finished difference Result 612 states and 1801 transitions. [2021-06-05 21:59:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:59,726 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 21:59:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:59,727 INFO L225 Difference]: With dead ends: 612 [2021-06-05 21:59:59,728 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 21:59:59,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:59:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 21:59:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 348. [2021-06-05 21:59:59,732 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 21:59:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1118 transitions. [2021-06-05 21:59:59,733 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1118 transitions. Word has length 20 [2021-06-05 21:59:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:59,733 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1118 transitions. [2021-06-05 21:59:59,733 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 21:59:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1118 transitions. [2021-06-05 21:59:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:59,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:59,733 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:59,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 21:59:59,934 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:59,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2058118979, now seen corresponding path program 51 times [2021-06-05 21:59:59,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:59,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136021882] [2021-06-05 21:59:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:00,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136021882] [2021-06-05 22:00:00,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136021882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926312281] [2021-06-05 22:00:00,015 INFO L93 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 22:00:00,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:00,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:00,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:00,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926312281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:00,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:00,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187380796] [2021-06-05 22:00:00,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:00,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:00,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:00,215 INFO L87 Difference]: Start difference. First operand 348 states and 1118 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 22:00:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:00,472 INFO L93 Difference]: Finished difference Result 546 states and 1653 transitions. [2021-06-05 22:00:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:00,472 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 22:00:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:00,473 INFO L225 Difference]: With dead ends: 546 [2021-06-05 22:00:00,473 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 22:00:00,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 22:00:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 345. [2021-06-05 22:00:00,477 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 22:00:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1103 transitions. [2021-06-05 22:00:00,478 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1103 transitions. Word has length 20 [2021-06-05 22:00:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:00,478 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1103 transitions. [2021-06-05 22:00:00,478 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 22:00:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1103 transitions. [2021-06-05 22:00:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:00,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:00,479 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:00,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 22:00:00,679 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash 786513107, now seen corresponding path program 52 times [2021-06-05 22:00:00,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:00,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14051308] [2021-06-05 22:00:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:00,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14051308] [2021-06-05 22:00:00,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14051308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087744681] [2021-06-05 22:00:00,745 INFO L93 rtionOrderModulation]: Changing 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 22:00:00,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:00,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087744681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:00,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:00,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365982891] [2021-06-05 22:00:00,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:00,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:00,936 INFO L87 Difference]: Start difference. First operand 345 states and 1103 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 22:00:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:01,496 INFO L93 Difference]: Finished difference Result 589 states and 1742 transitions. [2021-06-05 22:00:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:00:01,496 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 22:00:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:01,498 INFO L225 Difference]: With dead ends: 589 [2021-06-05 22:00:01,498 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 22:00:01,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:00:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 22:00:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 355. [2021-06-05 22:00:01,504 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 22:00:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1130 transitions. [2021-06-05 22:00:01,505 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1130 transitions. Word has length 20 [2021-06-05 22:00:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:01,506 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1130 transitions. [2021-06-05 22:00:01,506 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 22:00:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1130 transitions. [2021-06-05 22:00:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:01,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:01,506 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:01,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 22:00:01,721 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:01,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1128910819, now seen corresponding path program 53 times [2021-06-05 22:00:01,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:01,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879511925] [2021-06-05 22:00:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:01,795 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 22:00:01,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879511925] [2021-06-05 22:00:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879511925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525723489] [2021-06-05 22:00:01,795 INFO L93 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 22:00:01,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:01,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:01,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:01,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525723489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:01,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:01,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:01,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129520242] [2021-06-05 22:00:01,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:01,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:01,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:01,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:01,982 INFO L87 Difference]: Start difference. First operand 355 states and 1130 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 22:00:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:02,420 INFO L93 Difference]: Finished difference Result 560 states and 1688 transitions. [2021-06-05 22:00:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:02,421 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 22:00:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:02,422 INFO L225 Difference]: With dead ends: 560 [2021-06-05 22:00:02,422 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 22:00:02,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:00:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 22:00:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 344. [2021-06-05 22:00:02,429 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 22:00:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-06-05 22:00:02,430 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-06-05 22:00:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:02,430 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-06-05 22:00:02,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-06-05 22:00:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:02,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:02,431 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:02,645 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1232344509, now seen corresponding path program 54 times [2021-06-05 22:00:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:02,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258866106] [2021-06-05 22:00:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:02,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:02,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258866106] [2021-06-05 22:00:02,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258866106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:02,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019757215] [2021-06-05 22:00:02,727 INFO L93 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 22:00:02,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:02,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:02,953 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 22:00:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019757215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:02,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:02,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477200166] [2021-06-05 22:00:02,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:02,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:02,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:02,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:02,954 INFO L87 Difference]: Start difference. First operand 344 states and 1098 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 22:00:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:03,343 INFO L93 Difference]: Finished difference Result 492 states and 1505 transitions. [2021-06-05 22:00:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:03,344 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 22:00:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:03,344 INFO L225 Difference]: With dead ends: 492 [2021-06-05 22:00:03,345 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 22:00:03,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 22:00:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 346. [2021-06-05 22:00:03,350 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 22:00:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-06-05 22:00:03,351 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-06-05 22:00:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:03,351 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-06-05 22:00:03,351 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 22:00:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-06-05 22:00:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:03,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:03,352 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:03,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 22:00:03,569 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:03,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:03,569 INFO L82 PathProgramCache]: Analyzing trace with hash -480944071, now seen corresponding path program 55 times [2021-06-05 22:00:03,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:03,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911466610] [2021-06-05 22:00:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:03,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:03,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911466610] [2021-06-05 22:00:03,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911466610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367600309] [2021-06-05 22:00:03,643 INFO 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 22:00:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:03,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:03,874 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 22:00:03,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367600309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:03,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:03,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370279454] [2021-06-05 22:00:03,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:03,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:03,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:03,876 INFO L87 Difference]: Start difference. First operand 346 states and 1103 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 22:00:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:04,431 INFO L93 Difference]: Finished difference Result 517 states and 1557 transitions. [2021-06-05 22:00:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:04,432 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 22:00:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:04,432 INFO L225 Difference]: With dead ends: 517 [2021-06-05 22:00:04,432 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 22:00:04,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:00:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 22:00:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 356. [2021-06-05 22:00:04,438 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 22:00:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1130 transitions. [2021-06-05 22:00:04,439 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1130 transitions. Word has length 20 [2021-06-05 22:00:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:04,439 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1130 transitions. [2021-06-05 22:00:04,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1130 transitions. [2021-06-05 22:00:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:04,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:04,440 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:04,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:04,657 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1898599299, now seen corresponding path program 56 times [2021-06-05 22:00:04,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:04,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466914475] [2021-06-05 22:00:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:04,730 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 22:00:04,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:04,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466914475] [2021-06-05 22:00:04,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466914475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:04,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211342325] [2021-06-05 22:00:04,730 INFO L93 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 22:00:04,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:04,960 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 22:00:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211342325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:04,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:04,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:04,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528423030] [2021-06-05 22:00:04,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:04,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:04,961 INFO L87 Difference]: Start difference. First operand 356 states and 1130 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 22:00:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:05,368 INFO L93 Difference]: Finished difference Result 488 states and 1503 transitions. [2021-06-05 22:00:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:05,368 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 22:00:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:05,369 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:00:05,369 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 22:00:05,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 22:00:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 346. [2021-06-05 22:00:05,375 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 22:00:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-06-05 22:00:05,375 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-06-05 22:00:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-06-05 22:00:05,376 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 22:00:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-06-05 22:00:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:05,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:05,377 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:05,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 22:00:05,593 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -300223535, now seen corresponding path program 57 times [2021-06-05 22:00:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:05,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352798441] [2021-06-05 22:00:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:05,656 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 22:00:05,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352798441] [2021-06-05 22:00:05,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352798441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953243984] [2021-06-05 22:00:05,657 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 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 22:00:05,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:05,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:05,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953243984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:05,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:05,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:05,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718234740] [2021-06-05 22:00:05,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:05,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:05,854 INFO L87 Difference]: Start difference. First operand 346 states and 1103 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 22:00:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:06,306 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-06-05 22:00:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:06,307 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 22:00:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:06,308 INFO L225 Difference]: With dead ends: 688 [2021-06-05 22:00:06,308 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 22:00:06,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 22:00:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 356. [2021-06-05 22:00:06,315 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 22:00:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1141 transitions. [2021-06-05 22:00:06,316 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1141 transitions. Word has length 20 [2021-06-05 22:00:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:06,316 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1141 transitions. [2021-06-05 22:00:06,316 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 22:00:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1141 transitions. [2021-06-05 22:00:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:06,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:06,317 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:06,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:06,533 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1794131257, now seen corresponding path program 58 times [2021-06-05 22:00:06,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:06,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342391283] [2021-06-05 22:00:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:06,600 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 22:00:06,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:06,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342391283] [2021-06-05 22:00:06,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342391283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:06,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945765883] [2021-06-05 22:00:06,600 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 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 22:00:06,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:06,795 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 22:00:06,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945765883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:06,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:06,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:06,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949366963] [2021-06-05 22:00:06,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:06,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:06,796 INFO L87 Difference]: Start difference. First operand 356 states and 1141 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 22:00:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:07,310 INFO L93 Difference]: Finished difference Result 694 states and 2066 transitions. [2021-06-05 22:00:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:00:07,310 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 22:00:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:07,311 INFO L225 Difference]: With dead ends: 694 [2021-06-05 22:00:07,311 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 22:00:07,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:00:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 22:00:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 353. [2021-06-05 22:00:07,316 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 22:00:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1130 transitions. [2021-06-05 22:00:07,317 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1130 transitions. Word has length 20 [2021-06-05 22:00:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:07,317 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1130 transitions. [2021-06-05 22:00:07,317 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 22:00:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1130 transitions. [2021-06-05 22:00:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:07,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:07,318 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:07,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 22:00:07,518 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:07,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1256275679, now seen corresponding path program 59 times [2021-06-05 22:00:07,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:07,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796612999] [2021-06-05 22:00:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:07,591 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 22:00:07,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:07,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796612999] [2021-06-05 22:00:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796612999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:07,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434036064] [2021-06-05 22:00:07,592 INFO L93 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 22:00:07,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:07,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:07,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434036064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:07,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:07,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206959160] [2021-06-05 22:00:07,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:07,787 INFO L87 Difference]: Start difference. First operand 353 states and 1130 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 22:00:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:08,261 INFO L93 Difference]: Finished difference Result 658 states and 1984 transitions. [2021-06-05 22:00:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:08,261 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 22:00:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:08,262 INFO L225 Difference]: With dead ends: 658 [2021-06-05 22:00:08,262 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 22:00:08,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 22:00:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 350. [2021-06-05 22:00:08,268 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 22:00:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1119 transitions. [2021-06-05 22:00:08,268 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1119 transitions. Word has length 20 [2021-06-05 22:00:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:08,269 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1119 transitions. [2021-06-05 22:00:08,269 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 22:00:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1119 transitions. [2021-06-05 22:00:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:08,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:08,269 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:08,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:08,470 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:08,470 INFO L82 PathProgramCache]: Analyzing trace with hash -668530357, now seen corresponding path program 60 times [2021-06-05 22:00:08,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:08,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345570573] [2021-06-05 22:00:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:08,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:08,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345570573] [2021-06-05 22:00:08,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345570573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:08,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949783792] [2021-06-05 22:00:08,527 INFO L93 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 22:00:08,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:08,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949783792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:08,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:08,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:08,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33230467] [2021-06-05 22:00:08,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:08,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:08,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:08,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:08,711 INFO L87 Difference]: Start difference. First operand 350 states and 1119 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 22:00:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:09,131 INFO L93 Difference]: Finished difference Result 690 states and 2044 transitions. [2021-06-05 22:00:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:09,133 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 22:00:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:09,134 INFO L225 Difference]: With dead ends: 690 [2021-06-05 22:00:09,134 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 22:00:09,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 22:00:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 347. [2021-06-05 22:00:09,140 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 22:00:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-06-05 22:00:09,140 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-06-05 22:00:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:09,140 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-06-05 22:00:09,140 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 22:00:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-06-05 22:00:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:09,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:09,141 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:09,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 22:00:09,342 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1953273483, now seen corresponding path program 61 times [2021-06-05 22:00:09,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:09,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087776236] [2021-06-05 22:00:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:09,414 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 22:00:09,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:09,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087776236] [2021-06-05 22:00:09,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087776236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:09,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663684858] [2021-06-05 22:00:09,414 INFO 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 22:00:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:09,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:09,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:09,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663684858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:09,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:09,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:09,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829557382] [2021-06-05 22:00:09,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:09,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:09,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:09,632 INFO L87 Difference]: Start difference. First operand 347 states and 1108 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 22:00:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:09,976 INFO L93 Difference]: Finished difference Result 627 states and 1898 transitions. [2021-06-05 22:00:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:09,976 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 22:00:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:09,977 INFO L225 Difference]: With dead ends: 627 [2021-06-05 22:00:09,977 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 22:00:09,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 22:00:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 354. [2021-06-05 22:00:09,983 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 22:00:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1135 transitions. [2021-06-05 22:00:09,984 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1135 transitions. Word has length 20 [2021-06-05 22:00:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:09,984 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1135 transitions. [2021-06-05 22:00:09,984 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 22:00:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1135 transitions. [2021-06-05 22:00:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:09,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:09,985 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:10,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:10,204 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash 459365761, now seen corresponding path program 62 times [2021-06-05 22:00:10,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:10,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433138431] [2021-06-05 22:00:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:10,282 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 22:00:10,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433138431] [2021-06-05 22:00:10,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433138431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212536432] [2021-06-05 22:00:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:10,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:10,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:10,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212536432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:10,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:10,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:10,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576970461] [2021-06-05 22:00:10,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:10,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:10,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:10,517 INFO L87 Difference]: Start difference. First operand 354 states and 1135 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 22:00:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:11,120 INFO L93 Difference]: Finished difference Result 633 states and 1905 transitions. [2021-06-05 22:00:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:00:11,121 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 22:00:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:11,122 INFO L225 Difference]: With dead ends: 633 [2021-06-05 22:00:11,122 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 22:00:11,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:00:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 22:00:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 351. [2021-06-05 22:00:11,126 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 22:00:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1124 transitions. [2021-06-05 22:00:11,127 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1124 transitions. Word has length 20 [2021-06-05 22:00:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:11,127 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1124 transitions. [2021-06-05 22:00:11,127 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 22:00:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1124 transitions. [2021-06-05 22:00:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:11,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:11,128 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:11,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 22:00:11,331 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash 997221339, now seen corresponding path program 63 times [2021-06-05 22:00:11,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:11,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581117169] [2021-06-05 22:00:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:11,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:11,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581117169] [2021-06-05 22:00:11,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581117169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:11,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528190567] [2021-06-05 22:00:11,419 INFO L93 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 22:00:11,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:11,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:11,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:11,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:11,676 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 22:00:11,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528190567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:11,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:11,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:11,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438595829] [2021-06-05 22:00:11,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:11,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:11,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:11,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:11,677 INFO L87 Difference]: Start difference. First operand 351 states and 1124 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 22:00:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:12,086 INFO L93 Difference]: Finished difference Result 597 states and 1823 transitions. [2021-06-05 22:00:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:12,086 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 22:00:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:12,087 INFO L225 Difference]: With dead ends: 597 [2021-06-05 22:00:12,087 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 22:00:12,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 22:00:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 348. [2021-06-05 22:00:12,091 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 22:00:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-06-05 22:00:12,091 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-06-05 22:00:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:12,091 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-06-05 22:00:12,092 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 22:00:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-06-05 22:00:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:12,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:12,092 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:12,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable691 [2021-06-05 22:00:12,293 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:12,293 INFO L82 PathProgramCache]: Analyzing trace with hash -523116715, now seen corresponding path program 64 times [2021-06-05 22:00:12,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:12,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123201384] [2021-06-05 22:00:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:12,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123201384] [2021-06-05 22:00:12,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123201384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230452760] [2021-06-05 22:00:12,367 INFO L93 rtionOrderModulation]: Changing 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 22:00:12,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:12,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:12,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230452760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:12,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:12,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028371002] [2021-06-05 22:00:12,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:12,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:12,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:12,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:12,617 INFO L87 Difference]: Start difference. First operand 348 states and 1113 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 22:00:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:13,264 INFO L93 Difference]: Finished difference Result 702 states and 2083 transitions. [2021-06-05 22:00:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:13,264 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 22:00:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:13,265 INFO L225 Difference]: With dead ends: 702 [2021-06-05 22:00:13,265 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 22:00:13,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:00:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 22:00:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 356. [2021-06-05 22:00:13,271 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 22:00:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1149 transitions. [2021-06-05 22:00:13,272 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1149 transitions. Word has length 20 [2021-06-05 22:00:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:13,272 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1149 transitions. [2021-06-05 22:00:13,272 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 22:00:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1149 transitions. [2021-06-05 22:00:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:13,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:13,272 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:13,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 22:00:13,475 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2017024437, now seen corresponding path program 65 times [2021-06-05 22:00:13,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:13,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021400140] [2021-06-05 22:00:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:13,543 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 22:00:13,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:13,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021400140] [2021-06-05 22:00:13,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021400140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:13,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319164691] [2021-06-05 22:00:13,544 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 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 22:00:13,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:13,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:13,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319164691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:13,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:13,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:13,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555806402] [2021-06-05 22:00:13,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:13,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:13,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:13,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:13,771 INFO L87 Difference]: Start difference. First operand 356 states and 1149 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 22:00:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:14,463 INFO L93 Difference]: Finished difference Result 708 states and 2084 transitions. [2021-06-05 22:00:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:00:14,463 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 22:00:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:14,464 INFO L225 Difference]: With dead ends: 708 [2021-06-05 22:00:14,464 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 22:00:14,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:00:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 22:00:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 359. [2021-06-05 22:00:14,469 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 22:00:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1151 transitions. [2021-06-05 22:00:14,470 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1151 transitions. Word has length 20 [2021-06-05 22:00:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:14,470 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1151 transitions. [2021-06-05 22:00:14,470 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 22:00:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1151 transitions. [2021-06-05 22:00:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:14,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:14,470 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:14,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:14,671 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash 228283723, now seen corresponding path program 66 times [2021-06-05 22:00:14,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:14,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137174393] [2021-06-05 22:00:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:14,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137174393] [2021-06-05 22:00:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137174393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553861021] [2021-06-05 22:00:14,746 INFO L93 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 22:00:14,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:14,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:15,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553861021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:15,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:15,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:15,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471137676] [2021-06-05 22:00:15,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:15,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:15,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:15,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:15,008 INFO L87 Difference]: Start difference. First operand 359 states and 1151 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 22:00:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:15,419 INFO L93 Difference]: Finished difference Result 670 states and 2004 transitions. [2021-06-05 22:00:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:15,419 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 22:00:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:15,420 INFO L225 Difference]: With dead ends: 670 [2021-06-05 22:00:15,420 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 22:00:15,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 22:00:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 352. [2021-06-05 22:00:15,425 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 22:00:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1133 transitions. [2021-06-05 22:00:15,425 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1133 transitions. Word has length 20 [2021-06-05 22:00:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:15,425 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1133 transitions. [2021-06-05 22:00:15,425 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 22:00:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1133 transitions. [2021-06-05 22:00:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:15,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:15,426 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:15,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-05 22:00:15,626 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1520626123, now seen corresponding path program 67 times [2021-06-05 22:00:15,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:15,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319963598] [2021-06-05 22:00:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:15,711 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 22:00:15,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:15,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319963598] [2021-06-05 22:00:15,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319963598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:15,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788995958] [2021-06-05 22:00:15,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:15,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788995958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:15,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:15,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:15,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563522657] [2021-06-05 22:00:15,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:15,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:15,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:15,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:15,918 INFO L87 Difference]: Start difference. First operand 352 states and 1133 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 22:00:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:16,277 INFO L93 Difference]: Finished difference Result 633 states and 1922 transitions. [2021-06-05 22:00:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:16,277 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 22:00:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:16,278 INFO L225 Difference]: With dead ends: 633 [2021-06-05 22:00:16,278 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 22:00:16,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 22:00:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 349. [2021-06-05 22:00:16,283 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 22:00:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1118 transitions. [2021-06-05 22:00:16,283 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1118 transitions. Word has length 20 [2021-06-05 22:00:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:16,283 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1118 transitions. [2021-06-05 22:00:16,284 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 22:00:16,284 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1118 transitions. [2021-06-05 22:00:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:16,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:16,284 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:16,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:16,485 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash 249020251, now seen corresponding path program 68 times [2021-06-05 22:00:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:16,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464617082] [2021-06-05 22:00:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:16,579 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 22:00:16,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464617082] [2021-06-05 22:00:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464617082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295382386] [2021-06-05 22:00:16,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:16,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:16,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:16,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:16,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295382386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:16,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:16,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:16,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955650347] [2021-06-05 22:00:16,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:16,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:16,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:16,828 INFO L87 Difference]: Start difference. First operand 349 states and 1118 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 22:00:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:17,640 INFO L93 Difference]: Finished difference Result 670 states and 1996 transitions. [2021-06-05 22:00:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:00:17,640 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 22:00:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:17,641 INFO L225 Difference]: With dead ends: 670 [2021-06-05 22:00:17,641 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 22:00:17,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 862.1ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:00:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 22:00:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 359. [2021-06-05 22:00:17,646 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 22:00:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1145 transitions. [2021-06-05 22:00:17,646 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1145 transitions. Word has length 20 [2021-06-05 22:00:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:17,646 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1145 transitions. [2021-06-05 22:00:17,646 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 22:00:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1145 transitions. [2021-06-05 22:00:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:17,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:17,647 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:17,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 22:00:17,848 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:17,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1666403675, now seen corresponding path program 69 times [2021-06-05 22:00:17,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:17,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997636867] [2021-06-05 22:00:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:17,917 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 22:00:17,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:17,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997636867] [2021-06-05 22:00:17,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997636867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:17,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111106433] [2021-06-05 22:00:17,918 INFO L93 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 22:00:17,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:17,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:18,172 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 22:00:18,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111106433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:18,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:18,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:18,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981498075] [2021-06-05 22:00:18,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:18,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:18,172 INFO L87 Difference]: Start difference. First operand 359 states and 1145 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 22:00:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:18,762 INFO L93 Difference]: Finished difference Result 647 states and 1957 transitions. [2021-06-05 22:00:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:18,762 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 22:00:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:18,763 INFO L225 Difference]: With dead ends: 647 [2021-06-05 22:00:18,763 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 22:00:18,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:00:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 22:00:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 348. [2021-06-05 22:00:18,768 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 22:00:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-06-05 22:00:18,768 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-06-05 22:00:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:18,768 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-06-05 22:00:18,768 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 22:00:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-06-05 22:00:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:18,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:18,769 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:18,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-05 22:00:18,970 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1769837365, now seen corresponding path program 70 times [2021-06-05 22:00:18,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:18,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657610660] [2021-06-05 22:00:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:19,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:19,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657610660] [2021-06-05 22:00:19,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657610660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:19,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452974771] [2021-06-05 22:00:19,044 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 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 22:00:19,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:19,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:19,285 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 22:00:19,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452974771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:19,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:19,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:19,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091840066] [2021-06-05 22:00:19,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:19,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:19,285 INFO L87 Difference]: Start difference. First operand 348 states and 1113 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 22:00:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:19,633 INFO L93 Difference]: Finished difference Result 589 states and 1801 transitions. [2021-06-05 22:00:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:19,633 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 22:00:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:19,634 INFO L225 Difference]: With dead ends: 589 [2021-06-05 22:00:19,634 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 22:00:19,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 22:00:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 350. [2021-06-05 22:00:19,638 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 22:00:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1118 transitions. [2021-06-05 22:00:19,638 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1118 transitions. Word has length 20 [2021-06-05 22:00:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:19,638 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1118 transitions. [2021-06-05 22:00:19,638 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 22:00:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1118 transitions. [2021-06-05 22:00:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:19,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:19,639 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:19,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:19,840 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1018436927, now seen corresponding path program 71 times [2021-06-05 22:00:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:19,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197299161] [2021-06-05 22:00:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:19,910 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 22:00:19,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:19,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197299161] [2021-06-05 22:00:19,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197299161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:19,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246593440] [2021-06-05 22:00:19,911 INFO L93 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 22:00:19,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:20,115 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 22:00:20,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246593440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:20,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:20,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:20,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86374809] [2021-06-05 22:00:20,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:20,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:20,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:20,116 INFO L87 Difference]: Start difference. First operand 350 states and 1118 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 22:00:20,728 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:00:20,863 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 22:00:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:20,876 INFO L93 Difference]: Finished difference Result 614 states and 1853 transitions. [2021-06-05 22:00:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:20,877 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 22:00:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:20,878 INFO L225 Difference]: With dead ends: 614 [2021-06-05 22:00:20,878 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 22:00:20,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 771.8ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:00:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 22:00:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 360. [2021-06-05 22:00:20,882 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 22:00:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1145 transitions. [2021-06-05 22:00:20,883 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1145 transitions. Word has length 20 [2021-06-05 22:00:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:20,883 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1145 transitions. [2021-06-05 22:00:20,883 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 22:00:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1145 transitions. [2021-06-05 22:00:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:20,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:20,883 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:21,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:21,084 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1361106443, now seen corresponding path program 72 times [2021-06-05 22:00:21,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:21,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141036122] [2021-06-05 22:00:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:21,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:21,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141036122] [2021-06-05 22:00:21,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141036122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:21,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335041360] [2021-06-05 22:00:21,152 INFO L93 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 22:00:21,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:21,354 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 22:00:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335041360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:21,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:21,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:21,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242163628] [2021-06-05 22:00:21,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:21,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:21,355 INFO L87 Difference]: Start difference. First operand 360 states and 1145 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 22:00:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:21,795 INFO L93 Difference]: Finished difference Result 585 states and 1799 transitions. [2021-06-05 22:00:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:21,795 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 22:00:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:21,796 INFO L225 Difference]: With dead ends: 585 [2021-06-05 22:00:21,796 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 22:00:21,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 480.3ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 22:00:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 347. [2021-06-05 22:00:21,800 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 22:00:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-06-05 22:00:21,801 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-06-05 22:00:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:21,801 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-06-05 22:00:21,801 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 22:00:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-06-05 22:00:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:21,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:21,801 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:22,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-06-05 22:00:22,002 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:22,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:22,002 INFO L82 PathProgramCache]: Analyzing trace with hash -548004261, now seen corresponding path program 73 times [2021-06-05 22:00:22,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:22,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019805166] [2021-06-05 22:00:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:22,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:22,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019805166] [2021-06-05 22:00:22,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019805166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:22,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038616942] [2021-06-05 22:00:22,065 INFO 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 22:00:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:22,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:22,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:22,279 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 22:00:22,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038616942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:22,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:22,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:22,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242943810] [2021-06-05 22:00:22,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:22,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:22,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:22,280 INFO L87 Difference]: Start difference. First operand 347 states and 1108 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 22:00:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:22,681 INFO L93 Difference]: Finished difference Result 612 states and 1839 transitions. [2021-06-05 22:00:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:22,681 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 22:00:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:22,682 INFO L225 Difference]: With dead ends: 612 [2021-06-05 22:00:22,682 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 22:00:22,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 22:00:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 349. [2021-06-05 22:00:22,686 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 22:00:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-06-05 22:00:22,687 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-06-05 22:00:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:22,687 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-06-05 22:00:22,687 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 22:00:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-06-05 22:00:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:22,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:22,688 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:22,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:22,888 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1464351841, now seen corresponding path program 74 times [2021-06-05 22:00:22,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:22,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150331865] [2021-06-05 22:00:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:22,948 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 22:00:22,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:22,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150331865] [2021-06-05 22:00:22,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150331865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:22,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582968525] [2021-06-05 22:00:22,948 INFO L93 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 22:00:22,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:22,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:23,163 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 22:00:23,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582968525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:23,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:23,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:23,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964284612] [2021-06-05 22:00:23,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:23,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:23,164 INFO L87 Difference]: Start difference. First operand 349 states and 1113 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 22:00:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:23,572 INFO L93 Difference]: Finished difference Result 571 states and 1753 transitions. [2021-06-05 22:00:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:23,573 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 22:00:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:23,573 INFO L225 Difference]: With dead ends: 571 [2021-06-05 22:00:23,573 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 22:00:23,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 451.8ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 22:00:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2021-06-05 22:00:23,577 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 22:00:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1118 transitions. [2021-06-05 22:00:23,578 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1118 transitions. Word has length 20 [2021-06-05 22:00:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:23,578 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1118 transitions. [2021-06-05 22:00:23,578 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 22:00:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1118 transitions. [2021-06-05 22:00:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:23,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:23,579 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:23,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 22:00:23,794 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2079215017, now seen corresponding path program 75 times [2021-06-05 22:00:23,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:23,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652066861] [2021-06-05 22:00:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:23,854 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 22:00:23,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:23,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652066861] [2021-06-05 22:00:23,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652066861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:23,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661210864] [2021-06-05 22:00:23,855 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 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 22:00:23,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:24,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661210864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:24,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:24,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:24,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113531335] [2021-06-05 22:00:24,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:24,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:24,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:24,053 INFO L87 Difference]: Start difference. First operand 351 states and 1118 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 22:00:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:24,726 INFO L93 Difference]: Finished difference Result 594 states and 1798 transitions. [2021-06-05 22:00:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:24,726 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 22:00:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:24,727 INFO L225 Difference]: With dead ends: 594 [2021-06-05 22:00:24,727 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 22:00:24,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:00:24,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 22:00:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 361. [2021-06-05 22:00:24,732 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 22:00:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1145 transitions. [2021-06-05 22:00:24,732 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1145 transitions. Word has length 20 [2021-06-05 22:00:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:24,732 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1145 transitions. [2021-06-05 22:00:24,732 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 22:00:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1145 transitions. [2021-06-05 22:00:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:24,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:24,733 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:24,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 22:00:24,934 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash 300328353, now seen corresponding path program 76 times [2021-06-05 22:00:24,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:24,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193389555] [2021-06-05 22:00:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:24,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:24,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193389555] [2021-06-05 22:00:24,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193389555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:24,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203101924] [2021-06-05 22:00:24,998 INFO L93 rtionOrderModulation]: Changing 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 22:00:25,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:25,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:25,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203101924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:25,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:25,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490343805] [2021-06-05 22:00:25,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:25,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:25,197 INFO L87 Difference]: Start difference. First operand 361 states and 1145 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 22:00:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:25,627 INFO L93 Difference]: Finished difference Result 565 states and 1744 transitions. [2021-06-05 22:00:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:25,627 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 22:00:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:25,628 INFO L225 Difference]: With dead ends: 565 [2021-06-05 22:00:25,628 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 22:00:25,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 22:00:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 349. [2021-06-05 22:00:25,632 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 22:00:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-06-05 22:00:25,633 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-06-05 22:00:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:25,633 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-06-05 22:00:25,633 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 22:00:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-06-05 22:00:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:25,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:25,633 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:25,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:25,834 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash -942811430, now seen corresponding path program 77 times [2021-06-05 22:00:25,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:25,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711097435] [2021-06-05 22:00:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:25,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711097435] [2021-06-05 22:00:25,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711097435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558718577] [2021-06-05 22:00:25,876 INFO L93 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 22:00:25,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:25,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:25,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:25,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:25,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:25,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:25,980 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:00:25,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:25,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:00:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:26,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558718577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:26,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:26,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:00:26,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906194561] [2021-06-05 22:00:26,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:26,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:26,024 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 22:00:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:26,220 INFO L93 Difference]: Finished difference Result 493 states and 1515 transitions. [2021-06-05 22:00:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:26,221 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 22:00:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:26,221 INFO L225 Difference]: With dead ends: 493 [2021-06-05 22:00:26,221 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 22:00:26,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 22:00:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 339. [2021-06-05 22:00:26,225 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 22:00:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 22:00:26,225 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 22:00:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 22:00:26,225 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 22:00:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 22:00:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:26,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:26,226 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:26,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:26,426 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash -350392803, now seen corresponding path program 78 times [2021-06-05 22:00:26,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:26,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385015543] [2021-06-05 22:00:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:26,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:26,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385015543] [2021-06-05 22:00:26,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385015543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:26,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15110177] [2021-06-05 22:00:26,480 INFO L93 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 22:00:26,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:26,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:26,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:26,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:26,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:26,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:26,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:26,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:26,599 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 22:00:26,617 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 22:00:26,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15110177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:26,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:26,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:26,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676563863] [2021-06-05 22:00:26,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:26,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:26,618 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 22:00:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:26,754 INFO L93 Difference]: Finished difference Result 438 states and 1322 transitions. [2021-06-05 22:00:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:26,754 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 22:00:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:26,755 INFO L225 Difference]: With dead ends: 438 [2021-06-05 22:00:26,755 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 22:00:26,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 22:00:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 349. [2021-06-05 22:00:26,759 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 22:00:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-06-05 22:00:26,759 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-06-05 22:00:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:26,759 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-06-05 22:00:26,759 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 22:00:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-06-05 22:00:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:26,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:26,760 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:26,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:26,960 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 808250727, now seen corresponding path program 79 times [2021-06-05 22:00:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14796368] [2021-06-05 22:00:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:27,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:27,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14796368] [2021-06-05 22:00:27,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14796368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:27,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906539978] [2021-06-05 22:00:27,008 INFO 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 22:00:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:27,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:27,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:27,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:27,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:27,132 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 22:00:27,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:27,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 22:00:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:27,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906539978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:27,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:27,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304828480] [2021-06-05 22:00:27,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:27,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:27,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:27,156 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 22:00:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:27,344 INFO L93 Difference]: Finished difference Result 490 states and 1443 transitions. [2021-06-05 22:00:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:27,344 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 22:00:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:27,345 INFO L225 Difference]: With dead ends: 490 [2021-06-05 22:00:27,345 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 22:00:27,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 22:00:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-06-05 22:00:27,349 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 22:00:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1105 transitions. [2021-06-05 22:00:27,349 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1105 transitions. Word has length 20 [2021-06-05 22:00:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:27,349 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1105 transitions. [2021-06-05 22:00:27,349 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 22:00:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1105 transitions. [2021-06-05 22:00:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:27,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:27,350 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:27,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable836,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:27,550 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash -685656995, now seen corresponding path program 80 times [2021-06-05 22:00:27,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:27,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066703434] [2021-06-05 22:00:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:27,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:27,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066703434] [2021-06-05 22:00:27,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066703434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:27,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672872951] [2021-06-05 22:00:27,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:27,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:27,709 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 12 treesize of output 8 [2021-06-05 22:00:27,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:27,717 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 22:00:27,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:27,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 22:00:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:27,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672872951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:27,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:27,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:27,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882247355] [2021-06-05 22:00:27,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:27,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:27,740 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 22:00:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:27,864 INFO L93 Difference]: Finished difference Result 447 states and 1340 transitions. [2021-06-05 22:00:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:27,865 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 22:00:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:27,865 INFO L225 Difference]: With dead ends: 447 [2021-06-05 22:00:27,865 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 22:00:27,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 22:00:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 344. [2021-06-05 22:00:27,869 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 22:00:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1081 transitions. [2021-06-05 22:00:27,869 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1081 transitions. Word has length 20 [2021-06-05 22:00:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:27,869 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1081 transitions. [2021-06-05 22:00:27,869 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 22:00:27,869 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1081 transitions. [2021-06-05 22:00:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:27,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:27,870 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:28,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:28,071 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1902342315, now seen corresponding path program 81 times [2021-06-05 22:00:28,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:28,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329447827] [2021-06-05 22:00:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:28,119 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 22:00:28,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:28,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329447827] [2021-06-05 22:00:28,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329447827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52063817] [2021-06-05 22:00:28,120 INFO L93 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 22:00:28,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:28,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:28,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:28,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:28,277 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 22:00:28,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52063817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:28,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:28,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382951830] [2021-06-05 22:00:28,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:28,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:28,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:28,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:28,278 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 22:00:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:28,468 INFO L93 Difference]: Finished difference Result 416 states and 1256 transitions. [2021-06-05 22:00:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:28,469 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 22:00:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:28,469 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:00:28,469 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 22:00:28,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:28,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 22:00:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-06-05 22:00:28,473 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 22:00:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1103 transitions. [2021-06-05 22:00:28,474 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1103 transitions. Word has length 20 [2021-06-05 22:00:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:28,474 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1103 transitions. [2021-06-05 22:00:28,474 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 22:00:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1103 transitions. [2021-06-05 22:00:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:28,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:28,474 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:28,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:28,676 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash 408434593, now seen corresponding path program 82 times [2021-06-05 22:00:28,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:28,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905930581] [2021-06-05 22:00:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:28,756 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 22:00:28,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:28,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905930581] [2021-06-05 22:00:28,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905930581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955208059] [2021-06-05 22:00:28,756 INFO L93 rtionOrderModulation]: Changing 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 22:00:28,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:28,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:28,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955208059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:28,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:28,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210491912] [2021-06-05 22:00:28,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:28,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:28,939 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 22:00:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:29,111 INFO L93 Difference]: Finished difference Result 422 states and 1263 transitions. [2021-06-05 22:00:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:00:29,111 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 22:00:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:29,112 INFO L225 Difference]: With dead ends: 422 [2021-06-05 22:00:29,112 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 22:00:29,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 22:00:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 347. [2021-06-05 22:00:29,115 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 22:00:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1092 transitions. [2021-06-05 22:00:29,116 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1092 transitions. Word has length 20 [2021-06-05 22:00:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:29,116 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1092 transitions. [2021-06-05 22:00:29,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1092 transitions. [2021-06-05 22:00:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:29,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:29,117 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:29,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 22:00:29,318 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash 946290171, now seen corresponding path program 83 times [2021-06-05 22:00:29,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:29,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955035073] [2021-06-05 22:00:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:29,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:29,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955035073] [2021-06-05 22:00:29,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955035073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:29,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705328570] [2021-06-05 22:00:29,403 INFO L93 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 22:00:29,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:29,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:29,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705328570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:29,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:29,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:29,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186579088] [2021-06-05 22:00:29,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:29,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:29,568 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 22:00:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:29,785 INFO L93 Difference]: Finished difference Result 380 states and 1168 transitions. [2021-06-05 22:00:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:29,785 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 22:00:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:29,786 INFO L225 Difference]: With dead ends: 380 [2021-06-05 22:00:29,786 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 22:00:29,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 22:00:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 339. [2021-06-05 22:00:29,789 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 22:00:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 22:00:29,790 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 22:00:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:29,790 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 22:00:29,790 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 22:00:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 22:00:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:29,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:29,791 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:29,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-06-05 22:00:29,992 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash -818452776, now seen corresponding path program 84 times [2021-06-05 22:00:29,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:29,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892459599] [2021-06-05 22:00:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:30,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:30,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892459599] [2021-06-05 22:00:30,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892459599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:30,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090519619] [2021-06-05 22:00:30,049 INFO L93 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 22:00:30,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:30,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:30,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:30,163 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 6 treesize of output 4 [2021-06-05 22:00:30,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:30,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,196 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 22:00:30,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:30,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:30,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:30,210 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 22:00:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:30,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090519619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:30,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:30,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:00:30,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438997816] [2021-06-05 22:00:30,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:30,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:30,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:30,283 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 22:00:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:30,578 INFO L93 Difference]: Finished difference Result 550 states and 1646 transitions. [2021-06-05 22:00:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:30,578 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 22:00:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:30,579 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:00:30,579 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 22:00:30,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 22:00:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-06-05 22:00:30,584 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 22:00:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 22:00:30,585 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 22:00:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:30,585 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 22:00:30,585 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 22:00:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 22:00:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:30,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:30,586 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:30,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-06-05 22:00:30,789 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 190922387, now seen corresponding path program 85 times [2021-06-05 22:00:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:30,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231696442] [2021-06-05 22:00:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:30,850 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 22:00:30,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:30,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231696442] [2021-06-05 22:00:30,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231696442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:30,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242755096] [2021-06-05 22:00:30,850 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 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 22:00:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:30,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:30,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:00:30,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,976 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 22:00:30,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:30,997 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 22:00:30,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:31,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:31,021 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:00:31,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:31,021 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:31,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242755096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:31,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:31,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:31,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951092104] [2021-06-05 22:00:31,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:31,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:31,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:31,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:31,062 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 22:00:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:31,294 INFO L93 Difference]: Finished difference Result 591 states and 1730 transitions. [2021-06-05 22:00:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:31,296 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 22:00:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:31,297 INFO L225 Difference]: With dead ends: 591 [2021-06-05 22:00:31,297 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 22:00:31,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 22:00:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 351. [2021-06-05 22:00:31,303 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 22:00:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1109 transitions. [2021-06-05 22:00:31,304 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1109 transitions. Word has length 20 [2021-06-05 22:00:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:31,304 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1109 transitions. [2021-06-05 22:00:31,304 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 22:00:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1109 transitions. [2021-06-05 22:00:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:31,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:31,305 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:31,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:31,513 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1349565917, now seen corresponding path program 86 times [2021-06-05 22:00:31,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:31,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812154166] [2021-06-05 22:00:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:31,573 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 22:00:31,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:31,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812154166] [2021-06-05 22:00:31,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812154166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:31,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740559001] [2021-06-05 22:00:31,573 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 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 22:00:31,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:31,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:31,694 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 22:00:31,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:31,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:00:31,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:31,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:31,721 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 22:00:31,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:31,724 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 22:00:31,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:31,747 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:00:31,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:31,748 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740559001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:31,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:31,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:31,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588423441] [2021-06-05 22:00:31,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:31,799 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 22:00:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:31,956 INFO L93 Difference]: Finished difference Result 643 states and 1851 transitions. [2021-06-05 22:00:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:31,956 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 22:00:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:31,957 INFO L225 Difference]: With dead ends: 643 [2021-06-05 22:00:31,957 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 22:00:31,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 22:00:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 357. [2021-06-05 22:00:31,961 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 22:00:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1134 transitions. [2021-06-05 22:00:31,962 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1134 transitions. Word has length 20 [2021-06-05 22:00:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:31,962 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1134 transitions. [2021-06-05 22:00:31,962 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 22:00:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1134 transitions. [2021-06-05 22:00:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:31,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:31,963 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:32,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:32,163 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:32,163 INFO L82 PathProgramCache]: Analyzing trace with hash -144341805, now seen corresponding path program 87 times [2021-06-05 22:00:32,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:32,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337116794] [2021-06-05 22:00:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:32,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:32,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337116794] [2021-06-05 22:00:32,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337116794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:32,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221633054] [2021-06-05 22:00:32,223 INFO L93 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 22:00:32,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:32,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:32,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:32,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:32,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:32,389 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 22:00:32,389 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:00:32,391 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 13 treesize of output 9 [2021-06-05 22:00:32,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:32,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:32,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:32,413 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:32,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:32,413 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 22:00:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:32,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221633054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:32,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:32,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:32,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199325691] [2021-06-05 22:00:32,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:32,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:32,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:32,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:32,481 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 22:00:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:32,659 INFO L93 Difference]: Finished difference Result 600 states and 1742 transitions. [2021-06-05 22:00:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:32,659 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 22:00:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:32,660 INFO L225 Difference]: With dead ends: 600 [2021-06-05 22:00:32,660 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 22:00:32,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 22:00:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 355. [2021-06-05 22:00:32,664 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 22:00:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1123 transitions. [2021-06-05 22:00:32,665 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1123 transitions. Word has length 20 [2021-06-05 22:00:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:32,665 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1123 transitions. [2021-06-05 22:00:32,665 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 22:00:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1123 transitions. [2021-06-05 22:00:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:32,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:32,666 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:32,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:32,866 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash 601434872, now seen corresponding path program 88 times [2021-06-05 22:00:32,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:32,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369105593] [2021-06-05 22:00:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:32,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369105593] [2021-06-05 22:00:32,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369105593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340748296] [2021-06-05 22:00:32,912 INFO L93 rtionOrderModulation]: Changing 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 22:00:32,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:33,012 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 22:00:33,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:33,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:33,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:33,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,042 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:00:33,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:33,043 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 22:00:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:33,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340748296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:33,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:00:33,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994711232] [2021-06-05 22:00:33,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:33,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:33,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:33,101 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 22:00:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:33,310 INFO L93 Difference]: Finished difference Result 483 states and 1462 transitions. [2021-06-05 22:00:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:33,311 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 22:00:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:33,311 INFO L225 Difference]: With dead ends: 483 [2021-06-05 22:00:33,311 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 22:00:33,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 22:00:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 349. [2021-06-05 22:00:33,315 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 22:00:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-06-05 22:00:33,316 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-06-05 22:00:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:33,316 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-06-05 22:00:33,316 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 22:00:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-06-05 22:00:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:33,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:33,316 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:33,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:33,517 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2009499485, now seen corresponding path program 89 times [2021-06-05 22:00:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:33,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808956769] [2021-06-05 22:00:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:33,580 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 22:00:33,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:33,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808956769] [2021-06-05 22:00:33,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808956769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167447291] [2021-06-05 22:00:33,581 INFO L93 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 22:00:33,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:33,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:33,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:33,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,738 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:00:33,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:33,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:33,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:33,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:33,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167447291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:33,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:33,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446734831] [2021-06-05 22:00:33,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:33,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:33,810 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 22:00:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:33,995 INFO L93 Difference]: Finished difference Result 544 states and 1608 transitions. [2021-06-05 22:00:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:33,996 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 22:00:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:33,996 INFO L225 Difference]: With dead ends: 544 [2021-06-05 22:00:33,997 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 22:00:33,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 22:00:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 339. [2021-06-05 22:00:34,000 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 22:00:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1063 transitions. [2021-06-05 22:00:34,001 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1063 transitions. Word has length 20 [2021-06-05 22:00:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:34,001 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1063 transitions. [2021-06-05 22:00:34,001 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 22:00:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1063 transitions. [2021-06-05 22:00:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:34,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:34,001 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:34,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 22:00:34,202 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -652416419, now seen corresponding path program 90 times [2021-06-05 22:00:34,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:34,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550993540] [2021-06-05 22:00:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:34,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:34,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550993540] [2021-06-05 22:00:34,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550993540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:34,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765456462] [2021-06-05 22:00:34,258 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 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 22:00:34,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:34,373 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 12 treesize of output 8 [2021-06-05 22:00:34,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:34,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,426 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 22:00:34,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:34,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,461 INFO L628 ElimStorePlain]: treesize reduction 9, result has 79.1 percent of original size [2021-06-05 22:00:34,468 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 6 treesize of output 4 [2021-06-05 22:00:34,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,490 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 22:00:34,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:34,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 22:00:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:34,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765456462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:34,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:34,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:34,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375768513] [2021-06-05 22:00:34,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:34,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:34,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:34,564 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 22:00:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:34,819 INFO L93 Difference]: Finished difference Result 540 states and 1592 transitions. [2021-06-05 22:00:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:34,820 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 22:00:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:34,820 INFO L225 Difference]: With dead ends: 540 [2021-06-05 22:00:34,820 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 22:00:34,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 22:00:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 342. [2021-06-05 22:00:34,824 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 22:00:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1078 transitions. [2021-06-05 22:00:34,825 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1078 transitions. Word has length 20 [2021-06-05 22:00:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:34,825 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1078 transitions. [2021-06-05 22:00:34,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1078 transitions. [2021-06-05 22:00:34,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:34,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:34,826 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:35,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 22:00:35,026 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1685413921, now seen corresponding path program 91 times [2021-06-05 22:00:35,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:35,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250838288] [2021-06-05 22:00:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:35,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250838288] [2021-06-05 22:00:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250838288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079557900] [2021-06-05 22:00:35,082 INFO 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 22:00:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:35,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:35,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:35,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:35,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:35,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,236 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-06-05 22:00:35,238 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 6 treesize of output 4 [2021-06-05 22:00:35,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,267 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-06-05 22:00:35,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:35,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,289 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:35,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:35,289 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 22:00:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:35,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079557900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:35,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:35,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853441101] [2021-06-05 22:00:35,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:35,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:35,364 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 22:00:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:35,509 INFO L93 Difference]: Finished difference Result 478 states and 1449 transitions. [2021-06-05 22:00:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:35,509 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 22:00:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:35,510 INFO L225 Difference]: With dead ends: 478 [2021-06-05 22:00:35,510 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 22:00:35,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 22:00:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 333. [2021-06-05 22:00:35,514 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 22:00:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1039 transitions. [2021-06-05 22:00:35,514 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1039 transitions. Word has length 20 [2021-06-05 22:00:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:35,514 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1039 transitions. [2021-06-05 22:00:35,514 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 22:00:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1039 transitions. [2021-06-05 22:00:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:35,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:35,515 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:35,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable966 [2021-06-05 22:00:35,715 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:35,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1320603285, now seen corresponding path program 92 times [2021-06-05 22:00:35,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:35,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426572266] [2021-06-05 22:00:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:35,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:35,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426572266] [2021-06-05 22:00:35,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426572266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:35,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554330521] [2021-06-05 22:00:35,772 INFO L93 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 22:00:35,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:35,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:35,874 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 6 treesize of output 4 [2021-06-05 22:00:35,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,907 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-06-05 22:00:35,909 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 12 treesize of output 8 [2021-06-05 22:00:35,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:35,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:35,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,943 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:35,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:35,944 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 22:00:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:36,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554330521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:36,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:36,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772159549] [2021-06-05 22:00:36,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:36,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:36,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:36,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:36,022 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 22:00:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:36,230 INFO L93 Difference]: Finished difference Result 588 states and 1733 transitions. [2021-06-05 22:00:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:36,230 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 22:00:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:36,231 INFO L225 Difference]: With dead ends: 588 [2021-06-05 22:00:36,231 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 22:00:36,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 22:00:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 341. [2021-06-05 22:00:36,235 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 22:00:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1075 transitions. [2021-06-05 22:00:36,236 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1075 transitions. Word has length 20 [2021-06-05 22:00:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:36,236 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1075 transitions. [2021-06-05 22:00:36,236 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 22:00:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1075 transitions. [2021-06-05 22:00:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:36,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:36,237 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:36,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:36,453 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1480456289, now seen corresponding path program 93 times [2021-06-05 22:00:36,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:36,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45860659] [2021-06-05 22:00:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:36,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:36,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45860659] [2021-06-05 22:00:36,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45860659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546586663] [2021-06-05 22:00:36,514 INFO L93 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 22:00:36,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:36,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,661 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 22:00:36,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:36,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,672 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 13 treesize of output 9 [2021-06-05 22:00:36,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,701 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:36,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:36,701 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 22:00:36,777 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 22:00:36,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546586663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:36,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:36,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137430] [2021-06-05 22:00:36,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:36,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:36,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:36,777 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 22:00:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:36,992 INFO L93 Difference]: Finished difference Result 574 states and 1682 transitions. [2021-06-05 22:00:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:36,992 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 22:00:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:36,993 INFO L225 Difference]: With dead ends: 574 [2021-06-05 22:00:36,993 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 22:00:36,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 22:00:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2021-06-05 22:00:36,997 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 22:00:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1077 transitions. [2021-06-05 22:00:36,998 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1077 transitions. Word has length 20 [2021-06-05 22:00:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:36,998 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1077 transitions. [2021-06-05 22:00:36,998 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 22:00:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1077 transitions. [2021-06-05 22:00:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:36,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:36,999 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:37,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:37,200 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash -569202847, now seen corresponding path program 94 times [2021-06-05 22:00:37,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:37,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254750832] [2021-06-05 22:00:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:37,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:37,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254750832] [2021-06-05 22:00:37,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254750832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:37,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734979129] [2021-06-05 22:00:37,262 INFO L93 rtionOrderModulation]: Changing 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 22:00:37,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:37,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:37,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:37,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:37,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,407 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 22:00:37,410 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 6 treesize of output 4 [2021-06-05 22:00:37,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,412 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 22:00:37,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,434 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:00:37,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:37,434 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 22:00:37,515 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 22:00:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734979129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:37,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:37,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:37,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271874586] [2021-06-05 22:00:37,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:37,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:37,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:37,516 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 22:00:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:37,813 INFO L93 Difference]: Finished difference Result 619 states and 1797 transitions. [2021-06-05 22:00:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:37,813 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 22:00:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:37,814 INFO L225 Difference]: With dead ends: 619 [2021-06-05 22:00:37,814 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 22:00:37,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 22:00:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 337. [2021-06-05 22:00:37,819 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 22:00:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1059 transitions. [2021-06-05 22:00:37,819 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1059 transitions. Word has length 20 [2021-06-05 22:00:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:37,819 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1059 transitions. [2021-06-05 22:00:37,819 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 22:00:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1059 transitions. [2021-06-05 22:00:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:37,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:37,820 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:38,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 22:00:38,020 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash 723139553, now seen corresponding path program 95 times [2021-06-05 22:00:38,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:38,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749169137] [2021-06-05 22:00:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749169137] [2021-06-05 22:00:38,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749169137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655846797] [2021-06-05 22:00:38,078 INFO L93 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 22:00:38,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:38,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:38,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:38,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:38,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,216 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 22:00:38,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:38,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,221 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 22:00:38,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,240 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:38,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:38,241 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 22:00:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655846797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:38,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:38,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051652191] [2021-06-05 22:00:38,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:38,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:38,321 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 22:00:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:38,522 INFO L93 Difference]: Finished difference Result 553 states and 1649 transitions. [2021-06-05 22:00:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:38,522 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 22:00:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:38,523 INFO L225 Difference]: With dead ends: 553 [2021-06-05 22:00:38,523 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 22:00:38,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 22:00:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 334. [2021-06-05 22:00:38,527 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 22:00:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1044 transitions. [2021-06-05 22:00:38,527 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1044 transitions. Word has length 20 [2021-06-05 22:00:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:38,528 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1044 transitions. [2021-06-05 22:00:38,528 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 22:00:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1044 transitions. [2021-06-05 22:00:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:38,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:38,528 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:38,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 22:00:38,729 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:38,729 INFO L82 PathProgramCache]: Analyzing trace with hash -548466319, now seen corresponding path program 96 times [2021-06-05 22:00:38,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:38,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149078631] [2021-06-05 22:00:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:38,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149078631] [2021-06-05 22:00:38,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149078631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061309307] [2021-06-05 22:00:38,783 INFO L93 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 22:00:38,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:38,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:38,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:38,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,912 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 22:00:38,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:38,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:38,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:38,924 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 22:00:39,001 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 22:00:39,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061309307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:39,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:39,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:39,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293334932] [2021-06-05 22:00:39,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:39,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:39,002 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 22:00:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:39,302 INFO L93 Difference]: Finished difference Result 525 states and 1551 transitions. [2021-06-05 22:00:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:39,302 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 22:00:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:39,302 INFO L225 Difference]: With dead ends: 525 [2021-06-05 22:00:39,303 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 22:00:39,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 22:00:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 344. [2021-06-05 22:00:39,307 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 22:00:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1071 transitions. [2021-06-05 22:00:39,307 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1071 transitions. Word has length 20 [2021-06-05 22:00:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:39,307 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1071 transitions. [2021-06-05 22:00:39,307 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 22:00:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1071 transitions. [2021-06-05 22:00:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:39,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:39,308 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:39,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1022,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:39,513 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1831077051, now seen corresponding path program 97 times [2021-06-05 22:00:39,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:39,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701177492] [2021-06-05 22:00:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:39,569 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 22:00:39,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:39,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701177492] [2021-06-05 22:00:39,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701177492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:39,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010544098] [2021-06-05 22:00:39,570 INFO 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 22:00:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:39,679 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 6 treesize of output 4 [2021-06-05 22:00:39,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:39,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:39,708 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 22:00:39,710 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 12 treesize of output 8 [2021-06-05 22:00:39,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:39,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:39,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:39,720 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 22:00:39,794 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 22:00:39,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010544098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:39,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:39,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933755757] [2021-06-05 22:00:39,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:39,795 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 22:00:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:39,992 INFO L93 Difference]: Finished difference Result 496 states and 1497 transitions. [2021-06-05 22:00:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:39,992 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 22:00:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:39,993 INFO L225 Difference]: With dead ends: 496 [2021-06-05 22:00:39,993 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 22:00:39,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 22:00:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 331. [2021-06-05 22:00:39,996 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 22:00:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1031 transitions. [2021-06-05 22:00:39,997 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1031 transitions. Word has length 20 [2021-06-05 22:00:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:39,997 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1031 transitions. [2021-06-05 22:00:39,997 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 22:00:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1031 transitions. [2021-06-05 22:00:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:39,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:39,998 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:40,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 22:00:40,198 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 731475677, now seen corresponding path program 98 times [2021-06-05 22:00:40,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:40,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142637473] [2021-06-05 22:00:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:40,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:40,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142637473] [2021-06-05 22:00:40,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142637473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:40,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735549221] [2021-06-05 22:00:40,266 INFO L93 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 22:00:40,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:40,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:40,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:40,466 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 22:00:40,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735549221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:40,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:40,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:40,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742568399] [2021-06-05 22:00:40,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:40,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:40,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:40,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:40,467 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 22:00:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:40,652 INFO L93 Difference]: Finished difference Result 417 states and 1251 transitions. [2021-06-05 22:00:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:40,652 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 22:00:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:40,653 INFO L225 Difference]: With dead ends: 417 [2021-06-05 22:00:40,653 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 22:00:40,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 22:00:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 338. [2021-06-05 22:00:40,657 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 22:00:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1058 transitions. [2021-06-05 22:00:40,658 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1058 transitions. Word has length 20 [2021-06-05 22:00:40,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:40,658 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1058 transitions. [2021-06-05 22:00:40,658 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 22:00:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1058 transitions. [2021-06-05 22:00:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:40,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:40,659 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:40,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-05 22:00:40,881 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash -762432045, now seen corresponding path program 99 times [2021-06-05 22:00:40,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:40,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670291608] [2021-06-05 22:00:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:40,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:40,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670291608] [2021-06-05 22:00:40,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670291608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:40,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188338172] [2021-06-05 22:00:40,944 INFO L93 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 22:00:40,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:41,152 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 22:00:41,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188338172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:41,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:41,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:41,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87209591] [2021-06-05 22:00:41,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:41,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:41,153 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 22:00:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:41,430 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-06-05 22:00:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:00:41,431 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 22:00:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:41,431 INFO L225 Difference]: With dead ends: 423 [2021-06-05 22:00:41,431 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 22:00:41,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 22:00:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 335. [2021-06-05 22:00:41,435 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 22:00:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1047 transitions. [2021-06-05 22:00:41,435 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1047 transitions. Word has length 20 [2021-06-05 22:00:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:41,435 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1047 transitions. [2021-06-05 22:00:41,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1047 transitions. [2021-06-05 22:00:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:41,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:41,436 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:41,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:41,637 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash -224576467, now seen corresponding path program 100 times [2021-06-05 22:00:41,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:41,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108899408] [2021-06-05 22:00:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:41,697 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 22:00:41,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:41,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108899408] [2021-06-05 22:00:41,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108899408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:41,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581965623] [2021-06-05 22:00:41,697 INFO L93 rtionOrderModulation]: Changing 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 22:00:41,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:41,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:41,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581965623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:41,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:41,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:41,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260121688] [2021-06-05 22:00:41,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:41,882 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 22:00:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:42,120 INFO L93 Difference]: Finished difference Result 387 states and 1176 transitions. [2021-06-05 22:00:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:42,120 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 22:00:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:42,121 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:00:42,121 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 22:00:42,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 22:00:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 332. [2021-06-05 22:00:42,124 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 22:00:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-06-05 22:00:42,125 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-06-05 22:00:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:42,125 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-06-05 22:00:42,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-06-05 22:00:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:42,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:42,125 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:42,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:42,329 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:42,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1744914521, now seen corresponding path program 101 times [2021-06-05 22:00:42,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:42,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806678546] [2021-06-05 22:00:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:42,393 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 22:00:42,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:42,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806678546] [2021-06-05 22:00:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806678546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:42,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115856516] [2021-06-05 22:00:42,393 INFO L93 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 22:00:42,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:42,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:42,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:42,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:42,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115856516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:42,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:42,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:42,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504344720] [2021-06-05 22:00:42,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:42,567 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 22:00:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:42,814 INFO L93 Difference]: Finished difference Result 501 states and 1461 transitions. [2021-06-05 22:00:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:42,815 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 22:00:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:42,815 INFO L225 Difference]: With dead ends: 501 [2021-06-05 22:00:42,815 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 22:00:42,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 22:00:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 340. [2021-06-05 22:00:42,819 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 22:00:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1072 transitions. [2021-06-05 22:00:42,820 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1072 transitions. Word has length 20 [2021-06-05 22:00:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:42,820 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1072 transitions. [2021-06-05 22:00:42,820 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 22:00:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1072 transitions. [2021-06-05 22:00:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:42,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:42,820 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:43,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:43,021 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1056145053, now seen corresponding path program 102 times [2021-06-05 22:00:43,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:43,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026748249] [2021-06-05 22:00:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:43,081 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 22:00:43,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026748249] [2021-06-05 22:00:43,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026748249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:43,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677327053] [2021-06-05 22:00:43,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:43,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:43,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:43,269 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 22:00:43,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677327053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:43,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:43,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:43,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744636482] [2021-06-05 22:00:43,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:43,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:43,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:43,270 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 22:00:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:43,598 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-06-05 22:00:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:00:43,612 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 22:00:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:43,613 INFO L225 Difference]: With dead ends: 507 [2021-06-05 22:00:43,613 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 22:00:43,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:00:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 22:00:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 343. [2021-06-05 22:00:43,617 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 22:00:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1074 transitions. [2021-06-05 22:00:43,618 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1074 transitions. Word has length 20 [2021-06-05 22:00:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:43,618 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1074 transitions. [2021-06-05 22:00:43,618 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 22:00:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1074 transitions. [2021-06-05 22:00:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:43,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:43,619 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:43,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:43,819 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash -993514083, now seen corresponding path program 103 times [2021-06-05 22:00:43,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:43,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268991653] [2021-06-05 22:00:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:43,884 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 22:00:43,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268991653] [2021-06-05 22:00:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268991653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271397713] [2021-06-05 22:00:43,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:43,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:43,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271397713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:44,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:44,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:44,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347426785] [2021-06-05 22:00:44,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:44,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:44,104 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 22:00:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:44,348 INFO L93 Difference]: Finished difference Result 498 states and 1448 transitions. [2021-06-05 22:00:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:44,348 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 22:00:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:44,349 INFO L225 Difference]: With dead ends: 498 [2021-06-05 22:00:44,349 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 22:00:44,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 22:00:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 336. [2021-06-05 22:00:44,353 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 22:00:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1056 transitions. [2021-06-05 22:00:44,353 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1056 transitions. Word has length 20 [2021-06-05 22:00:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:44,353 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1056 transitions. [2021-06-05 22:00:44,353 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 22:00:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1056 transitions. [2021-06-05 22:00:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:44,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:44,356 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:44,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 22:00:44,577 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash 298828317, now seen corresponding path program 104 times [2021-06-05 22:00:44,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:44,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159813720] [2021-06-05 22:00:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:44,661 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 22:00:44,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:44,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159813720] [2021-06-05 22:00:44,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159813720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:44,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916574129] [2021-06-05 22:00:44,661 INFO L93 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 22:00:44,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:44,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:44,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:44,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916574129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:44,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:44,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:44,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118364902] [2021-06-05 22:00:44,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:44,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:44,846 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 22:00:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:45,030 INFO L93 Difference]: Finished difference Result 432 states and 1300 transitions. [2021-06-05 22:00:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:45,030 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 22:00:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:45,031 INFO L225 Difference]: With dead ends: 432 [2021-06-05 22:00:45,031 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 22:00:45,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 22:00:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 333. [2021-06-05 22:00:45,034 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 22:00:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1041 transitions. [2021-06-05 22:00:45,035 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1041 transitions. Word has length 20 [2021-06-05 22:00:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:45,035 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1041 transitions. [2021-06-05 22:00:45,035 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 22:00:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1041 transitions. [2021-06-05 22:00:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:45,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:45,035 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:45,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:45,236 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash -972777555, now seen corresponding path program 105 times [2021-06-05 22:00:45,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:45,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281771599] [2021-06-05 22:00:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:45,301 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 22:00:45,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281771599] [2021-06-05 22:00:45,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281771599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323179782] [2021-06-05 22:00:45,301 INFO L93 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 22:00:45,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:45,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:45,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:45,482 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 22:00:45,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323179782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:45,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:45,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:45,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271260842] [2021-06-05 22:00:45,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:45,482 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 22:00:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:45,861 INFO L93 Difference]: Finished difference Result 475 states and 1389 transitions. [2021-06-05 22:00:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:00:45,862 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 22:00:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:45,862 INFO L225 Difference]: With dead ends: 475 [2021-06-05 22:00:45,862 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 22:00:45,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:00:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 22:00:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 343. [2021-06-05 22:00:45,866 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 22:00:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1068 transitions. [2021-06-05 22:00:45,866 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1068 transitions. Word has length 20 [2021-06-05 22:00:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:45,867 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1068 transitions. [2021-06-05 22:00:45,867 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 22:00:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1068 transitions. [2021-06-05 22:00:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:45,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:45,867 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:46,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:46,068 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:46,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1406765815, now seen corresponding path program 106 times [2021-06-05 22:00:46,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:46,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555591997] [2021-06-05 22:00:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:46,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:46,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555591997] [2021-06-05 22:00:46,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555591997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677785894] [2021-06-05 22:00:46,132 INFO L93 rtionOrderModulation]: Changing 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 22:00:46,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:46,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:46,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:46,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677785894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:46,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:46,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406359990] [2021-06-05 22:00:46,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:46,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:46,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:46,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:46,317 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 22:00:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:46,603 INFO L93 Difference]: Finished difference Result 446 states and 1335 transitions. [2021-06-05 22:00:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:46,603 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 22:00:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:46,604 INFO L225 Difference]: With dead ends: 446 [2021-06-05 22:00:46,604 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 22:00:46,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 22:00:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 332. [2021-06-05 22:00:46,607 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 22:00:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-06-05 22:00:46,607 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-06-05 22:00:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:46,608 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-06-05 22:00:46,608 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 22:00:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-06-05 22:00:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:46,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:46,608 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:46,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1127,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:46,809 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1303332125, now seen corresponding path program 107 times [2021-06-05 22:00:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:46,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671620330] [2021-06-05 22:00:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:46,864 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 22:00:46,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:46,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671620330] [2021-06-05 22:00:46,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671620330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677935783] [2021-06-05 22:00:46,864 INFO L93 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 22:00:46,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677935783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:47,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:47,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:47,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264744789] [2021-06-05 22:00:47,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:47,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:47,058 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 22:00:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:47,355 INFO L93 Difference]: Finished difference Result 378 states and 1152 transitions. [2021-06-05 22:00:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:47,355 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 22:00:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:47,356 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:00:47,356 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:00:47,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:00:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 334. [2021-06-05 22:00:47,359 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 22:00:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-06-05 22:00:47,360 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-06-05 22:00:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:47,360 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-06-05 22:00:47,361 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 22:00:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-06-05 22:00:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:47,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:47,361 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:47,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-06-05 22:00:47,576 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2054732563, now seen corresponding path program 108 times [2021-06-05 22:00:47,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:47,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509393772] [2021-06-05 22:00:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:47,637 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 22:00:47,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:47,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509393772] [2021-06-05 22:00:47,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509393772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:47,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879328865] [2021-06-05 22:00:47,637 INFO L93 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 22:00:47,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:47,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:47,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:47,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:47,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879328865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:47,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:47,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:47,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528597308] [2021-06-05 22:00:47,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:47,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:47,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:47,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:47,824 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 22:00:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:48,125 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-06-05 22:00:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:48,125 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 22:00:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:48,126 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:00:48,126 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:00:48,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:00:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 344. [2021-06-05 22:00:48,129 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 22:00:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1068 transitions. [2021-06-05 22:00:48,130 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1068 transitions. Word has length 20 [2021-06-05 22:00:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:48,130 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1068 transitions. [2021-06-05 22:00:48,130 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 22:00:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1068 transitions. [2021-06-05 22:00:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:48,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:48,130 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:48,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 22:00:48,331 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:48,331 INFO L82 PathProgramCache]: Analyzing trace with hash 139308637, now seen corresponding path program 109 times [2021-06-05 22:00:48,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:48,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693434741] [2021-06-05 22:00:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:48,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:48,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693434741] [2021-06-05 22:00:48,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693434741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:48,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021508335] [2021-06-05 22:00:48,391 INFO 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 22:00:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:48,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:48,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:48,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021508335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:48,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:48,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:48,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528616605] [2021-06-05 22:00:48,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:48,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:48,591 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 22:00:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:48,837 INFO L93 Difference]: Finished difference Result 374 states and 1150 transitions. [2021-06-05 22:00:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:48,837 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 22:00:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:48,838 INFO L225 Difference]: With dead ends: 374 [2021-06-05 22:00:48,838 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 22:00:48,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 22:00:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 329. [2021-06-05 22:00:48,841 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 22:00:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1023 transitions. [2021-06-05 22:00:48,841 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1023 transitions. Word has length 20 [2021-06-05 22:00:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:48,841 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1023 transitions. [2021-06-05 22:00:48,841 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 22:00:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1023 transitions. [2021-06-05 22:00:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:48,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:48,842 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:49,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-06-05 22:00:49,042 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash 657164802, now seen corresponding path program 110 times [2021-06-05 22:00:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:49,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910362825] [2021-06-05 22:00:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:49,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:49,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910362825] [2021-06-05 22:00:49,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910362825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:49,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234477100] [2021-06-05 22:00:49,103 INFO L93 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 22:00:49,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:49,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:49,209 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 12 treesize of output 8 [2021-06-05 22:00:49,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:49,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:49,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:49,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:49,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:49,248 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:00:49,250 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 22:00:49,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:49,273 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:00:49,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:49,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 22:00:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234477100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:49,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:49,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:00:49,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347833261] [2021-06-05 22:00:49,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:49,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:49,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:49,345 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 22:00:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:49,655 INFO L93 Difference]: Finished difference Result 421 states and 1257 transitions. [2021-06-05 22:00:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:49,656 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 22:00:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:49,656 INFO L225 Difference]: With dead ends: 421 [2021-06-05 22:00:49,656 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:00:49,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:00:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:00:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 313. [2021-06-05 22:00:49,659 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 22:00:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 963 transitions. [2021-06-05 22:00:49,660 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 963 transitions. Word has length 20 [2021-06-05 22:00:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:49,660 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 963 transitions. [2021-06-05 22:00:49,660 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 22:00:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 963 transitions. [2021-06-05 22:00:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:49,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:49,660 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:49,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:49,861 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1666539965, now seen corresponding path program 111 times [2021-06-05 22:00:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:49,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987009550] [2021-06-05 22:00:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:49,923 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 22:00:49,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:49,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987009550] [2021-06-05 22:00:49,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987009550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:49,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425704396] [2021-06-05 22:00:49,924 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 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 22:00:50,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:50,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:50,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:50,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,077 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 22:00:50,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,126 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-05 22:00:50,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:50,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:50,153 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 22:00:50,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,179 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 22:00:50,179 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:00:50,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:50,180 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 22:00:50,230 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 22:00:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425704396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:50,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:50,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080864158] [2021-06-05 22:00:50,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:50,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:50,231 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 22:00:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:50,385 INFO L93 Difference]: Finished difference Result 488 states and 1442 transitions. [2021-06-05 22:00:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:50,385 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 22:00:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:50,386 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:00:50,386 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 22:00:50,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 22:00:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 329. [2021-06-05 22:00:50,389 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 22:00:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1020 transitions. [2021-06-05 22:00:50,390 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1020 transitions. Word has length 20 [2021-06-05 22:00:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:50,390 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1020 transitions. [2021-06-05 22:00:50,390 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 22:00:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1020 transitions. [2021-06-05 22:00:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:50,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:50,391 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:50,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:50,591 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:50,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1469783801, now seen corresponding path program 112 times [2021-06-05 22:00:50,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:50,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888281134] [2021-06-05 22:00:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:50,649 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 22:00:50,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888281134] [2021-06-05 22:00:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888281134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771398077] [2021-06-05 22:00:50,650 INFO L93 rtionOrderModulation]: Changing 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 22:00:50,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:50,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:50,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:50,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:50,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:50,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:50,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,758 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:00:50,760 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 22:00:50,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:50,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:50,771 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:50,814 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 22:00:50,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771398077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:50,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:00:50,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003092267] [2021-06-05 22:00:50,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:00:50,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:50,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:00:50,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:00:50,815 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 22:00:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:50,999 INFO L93 Difference]: Finished difference Result 540 states and 1563 transitions. [2021-06-05 22:00:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:50,999 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 22:00:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:51,000 INFO L225 Difference]: With dead ends: 540 [2021-06-05 22:00:51,000 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 22:00:51,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 22:00:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 335. [2021-06-05 22:00:51,004 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 22:00:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 22:00:51,004 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 22:00:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:51,004 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 22:00:51,004 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 22:00:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 22:00:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:51,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:51,005 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:51,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:51,206 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1331275773, now seen corresponding path program 113 times [2021-06-05 22:00:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:51,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570850945] [2021-06-05 22:00:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:51,282 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 22:00:51,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570850945] [2021-06-05 22:00:51,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570850945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314299037] [2021-06-05 22:00:51,282 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 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 22:00:51,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:51,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:51,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:00:51,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,437 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 22:00:51,439 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 6 treesize of output 4 [2021-06-05 22:00:51,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,471 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:00:51,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-05 22:00:51,473 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 22:00:51,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:51,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,495 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:51,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:51,495 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:00:51,538 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 22:00:51,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314299037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:51,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:51,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:51,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097471262] [2021-06-05 22:00:51,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:51,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:51,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:51,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:51,539 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 22:00:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:51,680 INFO L93 Difference]: Finished difference Result 497 states and 1454 transitions. [2021-06-05 22:00:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:51,681 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 22:00:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:51,681 INFO L225 Difference]: With dead ends: 497 [2021-06-05 22:00:51,681 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 22:00:51,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 22:00:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 333. [2021-06-05 22:00:51,685 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 22:00:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-06-05 22:00:51,685 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-06-05 22:00:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:51,686 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-06-05 22:00:51,686 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 22:00:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-06-05 22:00:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:51,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:51,686 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:51,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:51,887 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash -809850233, now seen corresponding path program 114 times [2021-06-05 22:00:51,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:51,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673712809] [2021-06-05 22:00:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:51,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:51,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673712809] [2021-06-05 22:00:51,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673712809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:51,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853972229] [2021-06-05 22:00:51,943 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 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 22:00:51,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:51,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:51,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:00:52,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:52,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:52,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,077 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 22:00:52,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,098 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:00:52,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-05 22:00:52,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:52,099 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:52,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853972229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:52,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:52,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:00:52,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345326407] [2021-06-05 22:00:52,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:00:52,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:00:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:52,156 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 22:00:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:52,293 INFO L93 Difference]: Finished difference Result 600 states and 1752 transitions. [2021-06-05 22:00:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:52,293 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 22:00:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:52,294 INFO L225 Difference]: With dead ends: 600 [2021-06-05 22:00:52,294 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 22:00:52,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 22:00:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 339. [2021-06-05 22:00:52,298 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 22:00:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1058 transitions. [2021-06-05 22:00:52,299 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1058 transitions. Word has length 20 [2021-06-05 22:00:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:52,299 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1058 transitions. [2021-06-05 22:00:52,299 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 22:00:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1058 transitions. [2021-06-05 22:00:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:52,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:52,299 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:52,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:52,500 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash 823201159, now seen corresponding path program 115 times [2021-06-05 22:00:52,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:52,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759632921] [2021-06-05 22:00:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:52,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:52,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759632921] [2021-06-05 22:00:52,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759632921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:52,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636000817] [2021-06-05 22:00:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:52,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:52,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:52,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:52,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,696 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:00:52,696 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-06-05 22:00:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:52,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,700 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 13 treesize of output 9 [2021-06-05 22:00:52,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,719 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:52,720 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-06-05 22:00:52,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:52,720 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:00:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:52,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636000817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:52,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:52,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:52,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437698469] [2021-06-05 22:00:52,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:52,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:52,791 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 22:00:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:52,956 INFO L93 Difference]: Finished difference Result 567 states and 1670 transitions. [2021-06-05 22:00:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:52,957 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 22:00:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:52,957 INFO L225 Difference]: With dead ends: 567 [2021-06-05 22:00:52,957 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 22:00:52,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 22:00:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 342. [2021-06-05 22:00:52,961 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 22:00:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1073 transitions. [2021-06-05 22:00:52,962 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1073 transitions. Word has length 20 [2021-06-05 22:00:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:52,962 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1073 transitions. [2021-06-05 22:00:52,962 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 22:00:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1073 transitions. [2021-06-05 22:00:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:52,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:52,962 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:53,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:53,163 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935797, now seen corresponding path program 116 times [2021-06-05 22:00:53,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:53,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154558559] [2021-06-05 22:00:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:53,216 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 22:00:53,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154558559] [2021-06-05 22:00:53,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154558559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706512382] [2021-06-05 22:00:53,217 INFO L93 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 22:00:53,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:53,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:53,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:53,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:53,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,331 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 5 treesize of output 3 [2021-06-05 22:00:53,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,370 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 22:00:53,372 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 6 treesize of output 4 [2021-06-05 22:00:53,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:53,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,396 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:00:53,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:53,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 22:00:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:53,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706512382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:53,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:53,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:53,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264526146] [2021-06-05 22:00:53,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:53,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:53,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:53,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:53,464 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 22:00:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:53,624 INFO L93 Difference]: Finished difference Result 534 states and 1593 transitions. [2021-06-05 22:00:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:53,625 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 22:00:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:53,625 INFO L225 Difference]: With dead ends: 534 [2021-06-05 22:00:53,625 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 22:00:53,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:00:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 22:00:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 333. [2021-06-05 22:00:53,642 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 22:00:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-06-05 22:00:53,643 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-06-05 22:00:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:53,643 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-06-05 22:00:53,643 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 22:00:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-06-05 22:00:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:53,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:53,644 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:53,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 22:00:53,844 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash 155014293, now seen corresponding path program 117 times [2021-06-05 22:00:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:53,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875570915] [2021-06-05 22:00:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:53,901 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 22:00:53,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:53,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875570915] [2021-06-05 22:00:53,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875570915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:53,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224116998] [2021-06-05 22:00:53,901 INFO L93 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 22:00:53,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:53,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:53,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:53,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:53,983 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 6 treesize of output 4 [2021-06-05 22:00:53,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:53,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,012 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:00:54,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:54,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:54,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:54,024 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:54,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224116998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:54,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:54,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:54,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992575981] [2021-06-05 22:00:54,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:54,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:54,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:54,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:54,100 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 22:00:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:54,316 INFO L93 Difference]: Finished difference Result 613 states and 1774 transitions. [2021-06-05 22:00:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:54,316 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 22:00:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:54,317 INFO L225 Difference]: With dead ends: 613 [2021-06-05 22:00:54,317 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 22:00:54,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 22:00:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 341. [2021-06-05 22:00:54,321 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 22:00:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1070 transitions. [2021-06-05 22:00:54,322 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1070 transitions. Word has length 20 [2021-06-05 22:00:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:54,322 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1070 transitions. [2021-06-05 22:00:54,322 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 22:00:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1070 transitions. [2021-06-05 22:00:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:54,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:54,322 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:54,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:54,523 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:54,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1338893429, now seen corresponding path program 118 times [2021-06-05 22:00:54,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:54,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440218949] [2021-06-05 22:00:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:54,580 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 22:00:54,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:54,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440218949] [2021-06-05 22:00:54,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440218949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:54,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357346547] [2021-06-05 22:00:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:54,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:54,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:54,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:54,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:54,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:54,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,757 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:00:54,760 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 22:00:54,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,763 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 13 treesize of output 9 [2021-06-05 22:00:54,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,788 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:54,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:54,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:54,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357346547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:54,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:54,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:54,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445864169] [2021-06-05 22:00:54,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:54,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:54,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:54,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:54,883 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 22:00:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:55,123 INFO L93 Difference]: Finished difference Result 599 states and 1723 transitions. [2021-06-05 22:00:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:55,124 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 22:00:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:55,125 INFO L225 Difference]: With dead ends: 599 [2021-06-05 22:00:55,125 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 22:00:55,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 22:00:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-06-05 22:00:55,130 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 22:00:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 22:00:55,131 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 22:00:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:55,131 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 22:00:55,131 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 22:00:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 22:00:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:55,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:55,132 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:55,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:55,345 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:55,345 INFO L82 PathProgramCache]: Analyzing trace with hash 906414731, now seen corresponding path program 119 times [2021-06-05 22:00:55,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:55,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697845011] [2021-06-05 22:00:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:55,402 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 22:00:55,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:55,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697845011] [2021-06-05 22:00:55,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697845011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:55,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230376284] [2021-06-05 22:00:55,403 INFO L93 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 22:00:55,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:55,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:55,491 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 13 treesize of output 9 [2021-06-05 22:00:55,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:55,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:55,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:55,532 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 22:00:55,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:55,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:55,556 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 22:00:55,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-06-05 22:00:55,557 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:00:55,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:55,557 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:00:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:55,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230376284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:55,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:55,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:55,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811578743] [2021-06-05 22:00:55,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:55,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:55,637 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 22:00:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:55,850 INFO L93 Difference]: Finished difference Result 624 states and 1812 transitions. [2021-06-05 22:00:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:55,850 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 22:00:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:55,851 INFO L225 Difference]: With dead ends: 624 [2021-06-05 22:00:55,851 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 22:00:55,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 22:00:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 338. [2021-06-05 22:00:55,855 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 22:00:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1060 transitions. [2021-06-05 22:00:55,856 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1060 transitions. Word has length 20 [2021-06-05 22:00:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:55,856 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1060 transitions. [2021-06-05 22:00:55,856 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 22:00:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1060 transitions. [2021-06-05 22:00:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:55,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:55,856 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:56,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:56,057 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2096210165, now seen corresponding path program 120 times [2021-06-05 22:00:56,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:56,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420432517] [2021-06-05 22:00:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:56,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420432517] [2021-06-05 22:00:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420432517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376203416] [2021-06-05 22:00:56,125 INFO L93 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 22:00:56,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:56,235 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 5 treesize of output 3 [2021-06-05 22:00:56,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,285 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 22:00:56,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:56,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,325 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:00:56,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:56,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,331 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 22:00:56,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,353 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:56,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-06-05 22:00:56,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:56,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:00:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:56,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376203416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:56,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:56,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:56,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361525837] [2021-06-05 22:00:56,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:56,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:56,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:56,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:56,429 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 22:00:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:56,614 INFO L93 Difference]: Finished difference Result 593 states and 1745 transitions. [2021-06-05 22:00:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:56,614 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 22:00:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:56,615 INFO L225 Difference]: With dead ends: 593 [2021-06-05 22:00:56,615 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 22:00:56,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 22:00:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-06-05 22:00:56,619 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 22:00:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 22:00:56,619 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 22:00:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:56,619 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 22:00:56,619 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 22:00:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 22:00:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:56,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:56,620 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:56,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1273,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:56,825 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash 927151259, now seen corresponding path program 121 times [2021-06-05 22:00:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:56,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313958873] [2021-06-05 22:00:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:56,881 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 22:00:56,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:56,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313958873] [2021-06-05 22:00:56,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313958873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:56,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897302140] [2021-06-05 22:00:56,881 INFO 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 22:00:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:56,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:56,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,022 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 22:00:57,022 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 22:00:57,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:57,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:57,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,050 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:00:57,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:57,051 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:00:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:57,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897302140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:57,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:57,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:57,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731243296] [2021-06-05 22:00:57,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:57,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:57,139 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 22:00:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:57,341 INFO L93 Difference]: Finished difference Result 547 states and 1592 transitions. [2021-06-05 22:00:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:57,341 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 22:00:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:57,342 INFO L225 Difference]: With dead ends: 547 [2021-06-05 22:00:57,342 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 22:00:57,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 22:00:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 339. [2021-06-05 22:00:57,346 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 22:00:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1059 transitions. [2021-06-05 22:00:57,346 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1059 transitions. Word has length 20 [2021-06-05 22:00:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:57,346 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1059 transitions. [2021-06-05 22:00:57,346 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 22:00:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1059 transitions. [2021-06-05 22:00:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:57,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:57,347 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:57,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:57,547 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -988272667, now seen corresponding path program 122 times [2021-06-05 22:00:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:57,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628927351] [2021-06-05 22:00:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:57,603 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 22:00:57,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628927351] [2021-06-05 22:00:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628927351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594873774] [2021-06-05 22:00:57,603 INFO L93 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 22:00:57,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:57,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:57,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:00:57,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,737 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 22:00:57,737 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-06-05 22:00:57,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:00:57,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:57,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,763 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:00:57,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:57,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 22:00:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:57,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594873774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:57,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:57,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:00:57,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463229153] [2021-06-05 22:00:57,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:00:57,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:57,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:00:57,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:00:57,835 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 22:00:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:58,016 INFO L93 Difference]: Finished difference Result 530 states and 1574 transitions. [2021-06-05 22:00:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:58,016 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 22:00:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:58,017 INFO L225 Difference]: With dead ends: 530 [2021-06-05 22:00:58,017 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 22:00:58,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 22:00:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 334. [2021-06-05 22:00:58,020 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 22:00:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-06-05 22:00:58,021 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-06-05 22:00:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:58,021 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-06-05 22:00:58,021 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 22:00:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-06-05 22:00:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:58,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:58,022 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:58,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:58,222 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1870628323, now seen corresponding path program 123 times [2021-06-05 22:00:58,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:58,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383308617] [2021-06-05 22:00:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:58,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383308617] [2021-06-05 22:00:58,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383308617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567520408] [2021-06-05 22:00:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:00:58,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:58,388 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 22:00:58,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,391 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 13 treesize of output 9 [2021-06-05 22:00:58,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,406 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:00:58,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:58,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:00:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567520408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:58,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:00:58,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184291033] [2021-06-05 22:00:58,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:00:58,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:00:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:58,435 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 22:00:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:58,546 INFO L93 Difference]: Finished difference Result 483 states and 1452 transitions. [2021-06-05 22:00:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:58,547 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 22:00:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:58,547 INFO L225 Difference]: With dead ends: 483 [2021-06-05 22:00:58,547 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 22:00:58,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 22:00:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 337. [2021-06-05 22:00:58,551 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 22:00:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1047 transitions. [2021-06-05 22:00:58,551 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1047 transitions. Word has length 20 [2021-06-05 22:00:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:58,551 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1047 transitions. [2021-06-05 22:00:58,551 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 22:00:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1047 transitions. [2021-06-05 22:00:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:58,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:58,552 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:58,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1309 [2021-06-05 22:00:58,752 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:58,753 INFO L82 PathProgramCache]: Analyzing trace with hash -237576931, now seen corresponding path program 124 times [2021-06-05 22:00:58,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:58,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010242964] [2021-06-05 22:00:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010242964] [2021-06-05 22:00:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010242964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793122400] [2021-06-05 22:00:58,805 INFO L93 rtionOrderModulation]: Changing 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 22:00:58,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:58,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:58,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:58,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:58,896 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 12 treesize of output 8 [2021-06-05 22:00:58,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:58,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,913 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:00:58,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:58,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:00:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793122400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:58,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:00:58,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780034230] [2021-06-05 22:00:58,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:00:58,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:58,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:00:58,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:00:58,966 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 22:00:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:59,102 INFO L93 Difference]: Finished difference Result 487 states and 1444 transitions. [2021-06-05 22:00:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:59,103 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 22:00:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:59,103 INFO L225 Difference]: With dead ends: 487 [2021-06-05 22:00:59,103 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 22:00:59,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 22:00:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 336. [2021-06-05 22:00:59,107 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 22:00:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1042 transitions. [2021-06-05 22:00:59,113 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1042 transitions. Word has length 20 [2021-06-05 22:00:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:59,113 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1042 transitions. [2021-06-05 22:00:59,113 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 22:00:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1042 transitions. [2021-06-05 22:00:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:59,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:59,113 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:59,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1315,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:59,329 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:59,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2100253409, now seen corresponding path program 125 times [2021-06-05 22:00:59,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:59,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819356093] [2021-06-05 22:00:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:59,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:59,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819356093] [2021-06-05 22:00:59,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819356093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:59,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830931763] [2021-06-05 22:00:59,383 INFO L93 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 22:00:59,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:59,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:59,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:00:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:59,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:59,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:59,469 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 22:00:59,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:59,483 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:00:59,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:59,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:00:59,534 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 22:00:59,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830931763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:59,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:59,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:00:59,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866470967] [2021-06-05 22:00:59,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:00:59,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:00:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:00:59,535 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 22:00:59,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:59,681 INFO L93 Difference]: Finished difference Result 444 states and 1347 transitions. [2021-06-05 22:00:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:59,682 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 22:00:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:59,682 INFO L225 Difference]: With dead ends: 444 [2021-06-05 22:00:59,683 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 22:00:59,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:00:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 22:00:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 319. [2021-06-05 22:00:59,686 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 22:00:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 981 transitions. [2021-06-05 22:00:59,687 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 981 transitions. Word has length 20 [2021-06-05 22:00:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:59,687 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 981 transitions. [2021-06-05 22:00:59,687 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 22:00:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 981 transitions. [2021-06-05 22:00:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:59,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:59,687 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:59,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 22:00:59,889 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1574380345, now seen corresponding path program 126 times [2021-06-05 22:00:59,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:59,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052010025] [2021-06-05 22:00:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:59,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:59,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052010025] [2021-06-05 22:00:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052010025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:59,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945718381] [2021-06-05 22:00:59,981 INFO L93 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 22:01:00,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:00,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:00,118 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 22:01:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945718381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:00,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:01:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104110445] [2021-06-05 22:01:00,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:01:00,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:00,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:01:00,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:01:00,119 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 22:01:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:00,224 INFO L93 Difference]: Finished difference Result 397 states and 1189 transitions. [2021-06-05 22:01:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:00,224 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 22:01:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:00,225 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:01:00,225 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:01:00,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:01:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 325. [2021-06-05 22:01:00,228 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 22:01:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1008 transitions. [2021-06-05 22:01:00,228 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1008 transitions. Word has length 20 [2021-06-05 22:01:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:00,229 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 1008 transitions. [2021-06-05 22:01:00,229 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 22:01:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1008 transitions. [2021-06-05 22:01:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:00,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:00,229 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:00,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-06-05 22:01:00,430 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash 763449995, now seen corresponding path program 127 times [2021-06-05 22:01:00,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:00,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158184249] [2021-06-05 22:01:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:00,496 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 22:01:00,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:00,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158184249] [2021-06-05 22:01:00,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158184249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107630170] [2021-06-05 22:01:00,497 INFO 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 22:01:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:00,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:00,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:00,609 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 22:01:00,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107630170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:00,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:01:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694183302] [2021-06-05 22:01:00,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:01:00,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:01:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:01:00,610 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 22:01:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:00,718 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-06-05 22:01:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:00,719 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 22:01:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:00,719 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:01:00,719 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 22:01:00,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 22:01:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-06-05 22:01:00,722 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 22:01:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 993 transitions. [2021-06-05 22:01:00,723 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 993 transitions. Word has length 20 [2021-06-05 22:01:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:00,723 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 993 transitions. [2021-06-05 22:01:00,723 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 22:01:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 993 transitions. [2021-06-05 22:01:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:00,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:00,723 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:00,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 22:01:00,924 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:00,924 INFO L82 PathProgramCache]: Analyzing trace with hash 766075771, now seen corresponding path program 128 times [2021-06-05 22:01:00,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:00,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848595551] [2021-06-05 22:01:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:00,978 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 22:01:00,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:00,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848595551] [2021-06-05 22:01:00,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848595551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829716864] [2021-06-05 22:01:00,978 INFO L93 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 22:01:01,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:01,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:01,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829716864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:01,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:01,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:01:01,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007897815] [2021-06-05 22:01:01,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:01:01,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:01,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:01:01,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:01:01,106 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 22:01:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:01,232 INFO L93 Difference]: Finished difference Result 361 states and 1097 transitions. [2021-06-05 22:01:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:01,232 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 22:01:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:01,233 INFO L225 Difference]: With dead ends: 361 [2021-06-05 22:01:01,233 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 22:01:01,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 22:01:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 328. [2021-06-05 22:01:01,236 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 22:01:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1008 transitions. [2021-06-05 22:01:01,236 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1008 transitions. Word has length 20 [2021-06-05 22:01:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:01,236 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 1008 transitions. [2021-06-05 22:01:01,236 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 22:01:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1008 transitions. [2021-06-05 22:01:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:01,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:01,237 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:01,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1342,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:01,437 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1330075033, now seen corresponding path program 129 times [2021-06-05 22:01:01,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:01,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996449851] [2021-06-05 22:01:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:01,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:01,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996449851] [2021-06-05 22:01:01,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996449851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:01,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554857631] [2021-06-05 22:01:01,506 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 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 22:01:01,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:01,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:01,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:01,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554857631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:01,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:01,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:01,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113598936] [2021-06-05 22:01:01,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:01,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:01,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:01,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:01,667 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 22:01:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:01,808 INFO L93 Difference]: Finished difference Result 483 states and 1424 transitions. [2021-06-05 22:01:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:01,808 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 22:01:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:01,809 INFO L225 Difference]: With dead ends: 483 [2021-06-05 22:01:01,809 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 22:01:01,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 22:01:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 338. [2021-06-05 22:01:01,812 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 22:01:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1053 transitions. [2021-06-05 22:01:01,813 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1053 transitions. Word has length 20 [2021-06-05 22:01:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:01,813 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1053 transitions. [2021-06-05 22:01:01,813 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 22:01:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1053 transitions. [2021-06-05 22:01:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:01,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:01,813 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:02,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1346 [2021-06-05 22:01:02,014 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1470984541, now seen corresponding path program 130 times [2021-06-05 22:01:02,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:02,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962987396] [2021-06-05 22:01:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:02,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:02,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962987396] [2021-06-05 22:01:02,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962987396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148279733] [2021-06-05 22:01:02,074 INFO L93 rtionOrderModulation]: Changing 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 22:01:02,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:02,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:02,231 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 22:01:02,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148279733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:02,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:02,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855453781] [2021-06-05 22:01:02,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:02,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:02,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:02,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:02,232 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 22:01:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:02,405 INFO L93 Difference]: Finished difference Result 469 states and 1373 transitions. [2021-06-05 22:01:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:02,406 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 22:01:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:02,406 INFO L225 Difference]: With dead ends: 469 [2021-06-05 22:01:02,406 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 22:01:02,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 22:01:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-06-05 22:01:02,410 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 22:01:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-06-05 22:01:02,410 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-06-05 22:01:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:02,410 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-06-05 22:01:02,410 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 22:01:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-06-05 22:01:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:02,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:02,411 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:02,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1353 [2021-06-05 22:01:02,611 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:02,612 INFO L82 PathProgramCache]: Analyzing trace with hash -578674595, now seen corresponding path program 131 times [2021-06-05 22:01:02,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:02,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806112249] [2021-06-05 22:01:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:02,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:02,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806112249] [2021-06-05 22:01:02,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806112249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616119087] [2021-06-05 22:01:02,681 INFO L93 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 22:01:02,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:02,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616119087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:02,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349946625] [2021-06-05 22:01:02,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:02,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:02,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:02,891 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 22:01:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:03,054 INFO L93 Difference]: Finished difference Result 540 states and 1571 transitions. [2021-06-05 22:01:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:03,054 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 22:01:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:03,055 INFO L225 Difference]: With dead ends: 540 [2021-06-05 22:01:03,055 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 22:01:03,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 22:01:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 344. [2021-06-05 22:01:03,058 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 22:01:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1070 transitions. [2021-06-05 22:01:03,059 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1070 transitions. Word has length 20 [2021-06-05 22:01:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:03,059 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1070 transitions. [2021-06-05 22:01:03,059 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 22:01:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1070 transitions. [2021-06-05 22:01:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:03,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:03,059 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:03,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:03,260 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 713667805, now seen corresponding path program 132 times [2021-06-05 22:01:03,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:03,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546240620] [2021-06-05 22:01:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:03,331 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 22:01:03,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:03,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546240620] [2021-06-05 22:01:03,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546240620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:03,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787206431] [2021-06-05 22:01:03,332 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 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 22:01:03,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:03,533 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 22:01:03,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787206431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:03,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:03,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:03,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313592178] [2021-06-05 22:01:03,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:03,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:03,534 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 22:01:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:03,669 INFO L93 Difference]: Finished difference Result 509 states and 1504 transitions. [2021-06-05 22:01:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:03,669 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 22:01:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:03,669 INFO L225 Difference]: With dead ends: 509 [2021-06-05 22:01:03,670 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 22:01:03,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 22:01:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 341. [2021-06-05 22:01:03,673 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 22:01:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-06-05 22:01:03,674 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-06-05 22:01:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:03,674 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-06-05 22:01:03,674 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 22:01:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-06-05 22:01:03,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:03,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:03,674 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:03,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1369,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:03,875 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash -557938067, now seen corresponding path program 133 times [2021-06-05 22:01:03,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:03,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837130024] [2021-06-05 22:01:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:03,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:03,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837130024] [2021-06-05 22:01:03,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837130024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:03,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004105677] [2021-06-05 22:01:03,938 INFO 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 22:01:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:03,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:04,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004105677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:04,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:04,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:04,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190707685] [2021-06-05 22:01:04,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:04,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:04,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:04,115 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 22:01:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:04,289 INFO L93 Difference]: Finished difference Result 506 states and 1452 transitions. [2021-06-05 22:01:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:04,290 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 22:01:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:04,290 INFO L225 Difference]: With dead ends: 506 [2021-06-05 22:01:04,290 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 22:01:04,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 22:01:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 345. [2021-06-05 22:01:04,294 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 22:01:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1069 transitions. [2021-06-05 22:01:04,295 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1069 transitions. Word has length 20 [2021-06-05 22:01:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:04,295 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1069 transitions. [2021-06-05 22:01:04,295 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 22:01:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1069 transitions. [2021-06-05 22:01:04,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:04,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:04,295 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:04,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-06-05 22:01:04,496 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:04,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1821605303, now seen corresponding path program 134 times [2021-06-05 22:01:04,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:04,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114387067] [2021-06-05 22:01:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:04,577 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 22:01:04,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:04,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114387067] [2021-06-05 22:01:04,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114387067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:04,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002758207] [2021-06-05 22:01:04,577 INFO L93 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 22:01:04,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:04,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:04,747 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 22:01:04,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002758207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:04,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:04,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:04,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440024331] [2021-06-05 22:01:04,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:04,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:04,748 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 22:01:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:04,984 INFO L93 Difference]: Finished difference Result 512 states and 1473 transitions. [2021-06-05 22:01:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:04,984 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 22:01:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:04,985 INFO L225 Difference]: With dead ends: 512 [2021-06-05 22:01:04,985 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 22:01:04,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:04,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 22:01:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 342. [2021-06-05 22:01:04,988 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 22:01:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1059 transitions. [2021-06-05 22:01:04,989 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1059 transitions. Word has length 20 [2021-06-05 22:01:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:04,989 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1059 transitions. [2021-06-05 22:01:04,989 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 22:01:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1059 transitions. [2021-06-05 22:01:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:04,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:04,990 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:05,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-06-05 22:01:05,193 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1603864071, now seen corresponding path program 135 times [2021-06-05 22:01:05,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:05,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545945585] [2021-06-05 22:01:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:05,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:05,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545945585] [2021-06-05 22:01:05,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545945585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273651555] [2021-06-05 22:01:05,256 INFO L93 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 22:01:05,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:05,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:05,420 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 22:01:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273651555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:05,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:05,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387151228] [2021-06-05 22:01:05,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:05,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:05,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:05,421 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 22:01:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:05,601 INFO L93 Difference]: Finished difference Result 445 states and 1330 transitions. [2021-06-05 22:01:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:05,602 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 22:01:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:05,602 INFO L225 Difference]: With dead ends: 445 [2021-06-05 22:01:05,602 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 22:01:05,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 22:01:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 343. [2021-06-05 22:01:05,606 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 22:01:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-06-05 22:01:05,606 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-06-05 22:01:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:05,606 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-06-05 22:01:05,606 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 22:01:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-06-05 22:01:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:05,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:05,607 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:05,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1393 [2021-06-05 22:01:05,808 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:05,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1398760825, now seen corresponding path program 136 times [2021-06-05 22:01:05,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:05,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510384154] [2021-06-05 22:01:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:05,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:05,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510384154] [2021-06-05 22:01:05,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510384154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417111644] [2021-06-05 22:01:05,870 INFO L93 rtionOrderModulation]: Changing 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 22:01:05,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:05,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417111644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:06,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:06,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950695668] [2021-06-05 22:01:06,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:06,040 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 22:01:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:06,214 INFO L93 Difference]: Finished difference Result 439 states and 1312 transitions. [2021-06-05 22:01:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:06,214 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 22:01:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:06,214 INFO L225 Difference]: With dead ends: 439 [2021-06-05 22:01:06,214 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 22:01:06,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 22:01:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 332. [2021-06-05 22:01:06,218 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 22:01:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1024 transitions. [2021-06-05 22:01:06,218 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1024 transitions. Word has length 20 [2021-06-05 22:01:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:06,218 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1024 transitions. [2021-06-05 22:01:06,218 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 22:01:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1024 transitions. [2021-06-05 22:01:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:06,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:06,219 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:06,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 22:01:06,419 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:06,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1000341435, now seen corresponding path program 137 times [2021-06-05 22:01:06,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:06,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599102251] [2021-06-05 22:01:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:06,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599102251] [2021-06-05 22:01:06,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599102251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347312658] [2021-06-05 22:01:06,488 INFO L93 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 22:01:06,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:06,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347312658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:06,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:06,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73552817] [2021-06-05 22:01:06,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:06,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:06,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:06,665 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 22:01:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:06,859 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-06-05 22:01:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:06,859 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 22:01:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:06,860 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:01:06,860 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:01:06,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:01:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 329. [2021-06-05 22:01:06,863 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 22:01:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1012 transitions. [2021-06-05 22:01:06,863 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1012 transitions. Word has length 20 [2021-06-05 22:01:06,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:06,863 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1012 transitions. [2021-06-05 22:01:06,863 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 22:01:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1012 transitions. [2021-06-05 22:01:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:06,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:06,864 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:07,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:07,064 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash 357143421, now seen corresponding path program 138 times [2021-06-05 22:01:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:07,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237167508] [2021-06-05 22:01:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:07,121 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 22:01:07,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:07,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237167508] [2021-06-05 22:01:07,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237167508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:07,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961947627] [2021-06-05 22:01:07,122 INFO L93 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 22:01:07,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:01:07,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:07,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961947627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:07,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:07,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:07,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097737487] [2021-06-05 22:01:07,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:07,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:07,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:07,297 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 22:01:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:07,470 INFO L93 Difference]: Finished difference Result 407 states and 1195 transitions. [2021-06-05 22:01:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:07,471 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 22:01:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:07,471 INFO L225 Difference]: With dead ends: 407 [2021-06-05 22:01:07,471 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:01:07,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:07,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:01:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2021-06-05 22:01:07,474 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 22:01:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1051 transitions. [2021-06-05 22:01:07,475 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1051 transitions. Word has length 20 [2021-06-05 22:01:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:07,475 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1051 transitions. [2021-06-05 22:01:07,475 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 22:01:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1051 transitions. [2021-06-05 22:01:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:07,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:07,475 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:07,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1412,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:07,676 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:07,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1558280505, now seen corresponding path program 139 times [2021-06-05 22:01:07,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:07,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783311108] [2021-06-05 22:01:07,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:07,734 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 22:01:07,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783311108] [2021-06-05 22:01:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783311108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163345064] [2021-06-05 22:01:07,735 INFO 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 22:01:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:07,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163345064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:07,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:07,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:07,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104969577] [2021-06-05 22:01:07,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:07,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:07,913 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 22:01:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:08,098 INFO L93 Difference]: Finished difference Result 413 states and 1216 transitions. [2021-06-05 22:01:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:08,098 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 22:01:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:08,099 INFO L225 Difference]: With dead ends: 413 [2021-06-05 22:01:08,099 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 22:01:08,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 22:01:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 341. [2021-06-05 22:01:08,102 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 22:01:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-06-05 22:01:08,103 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-06-05 22:01:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:08,103 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-06-05 22:01:08,103 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 22:01:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-06-05 22:01:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:08,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:08,103 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:08,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:08,304 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:08,304 INFO L82 PathProgramCache]: Analyzing trace with hash -518044707, now seen corresponding path program 140 times [2021-06-05 22:01:08,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:08,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802585078] [2021-06-05 22:01:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:08,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:08,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802585078] [2021-06-05 22:01:08,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802585078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:08,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198733449] [2021-06-05 22:01:08,363 INFO L93 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 22:01:08,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:08,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:08,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:08,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198733449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:08,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:08,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:08,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133661228] [2021-06-05 22:01:08,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:08,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:08,521 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 22:01:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:08,716 INFO L93 Difference]: Finished difference Result 382 states and 1151 transitions. [2021-06-05 22:01:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:08,717 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 22:01:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:08,717 INFO L225 Difference]: With dead ends: 382 [2021-06-05 22:01:08,717 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 22:01:08,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 22:01:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 331. [2021-06-05 22:01:08,720 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 22:01:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1017 transitions. [2021-06-05 22:01:08,721 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1017 transitions. Word has length 20 [2021-06-05 22:01:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:08,721 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1017 transitions. [2021-06-05 22:01:08,721 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 22:01:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1017 transitions. [2021-06-05 22:01:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:08,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:08,721 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:08,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-06-05 22:01:08,922 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1938346827, now seen corresponding path program 141 times [2021-06-05 22:01:08,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:08,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458841403] [2021-06-05 22:01:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:08,984 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 22:01:08,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:08,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458841403] [2021-06-05 22:01:08,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458841403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:08,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473792945] [2021-06-05 22:01:08,985 INFO L93 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 22:01:09,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:09,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473792945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:09,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:09,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:09,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377878140] [2021-06-05 22:01:09,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:09,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:09,181 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 22:01:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:09,404 INFO L93 Difference]: Finished difference Result 406 states and 1204 transitions. [2021-06-05 22:01:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:09,404 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 22:01:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:09,405 INFO L225 Difference]: With dead ends: 406 [2021-06-05 22:01:09,405 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 22:01:09,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 22:01:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 339. [2021-06-05 22:01:09,408 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 22:01:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1048 transitions. [2021-06-05 22:01:09,409 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1048 transitions. Word has length 20 [2021-06-05 22:01:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:09,409 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1048 transitions. [2021-06-05 22:01:09,409 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 22:01:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1048 transitions. [2021-06-05 22:01:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:09,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:09,409 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:09,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 22:01:09,613 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 444439105, now seen corresponding path program 142 times [2021-06-05 22:01:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:09,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112150511] [2021-06-05 22:01:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:09,667 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 22:01:09,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:09,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112150511] [2021-06-05 22:01:09,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112150511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:09,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605047084] [2021-06-05 22:01:09,668 INFO L93 rtionOrderModulation]: Changing 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 22:01:09,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:09,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:09,857 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 22:01:09,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605047084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:09,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:09,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:09,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030564839] [2021-06-05 22:01:09,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:09,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:09,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:09,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:09,858 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 22:01:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:10,045 INFO L93 Difference]: Finished difference Result 412 states and 1211 transitions. [2021-06-05 22:01:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:10,046 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 22:01:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:10,046 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:01:10,046 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 22:01:10,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 22:01:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 336. [2021-06-05 22:01:10,049 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 22:01:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-06-05 22:01:10,050 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-06-05 22:01:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:10,050 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-06-05 22:01:10,050 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 22:01:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-06-05 22:01:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:10,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:10,050 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:10,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-06-05 22:01:10,251 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:10,251 INFO L82 PathProgramCache]: Analyzing trace with hash 982294683, now seen corresponding path program 143 times [2021-06-05 22:01:10,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:10,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699225069] [2021-06-05 22:01:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:10,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:10,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699225069] [2021-06-05 22:01:10,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699225069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:10,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236293115] [2021-06-05 22:01:10,307 INFO L93 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 22:01:10,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236293115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:10,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:10,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:10,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015920013] [2021-06-05 22:01:10,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:10,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:10,488 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 22:01:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:10,723 INFO L93 Difference]: Finished difference Result 376 states and 1129 transitions. [2021-06-05 22:01:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:10,723 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 22:01:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:10,724 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:01:10,724 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 22:01:10,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 22:01:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 333. [2021-06-05 22:01:10,735 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 22:01:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-06-05 22:01:10,735 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-06-05 22:01:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:10,735 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-06-05 22:01:10,735 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 22:01:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-06-05 22:01:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:10,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:10,736 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:10,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-06-05 22:01:10,936 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:10,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:10,937 INFO L82 PathProgramCache]: Analyzing trace with hash -538043371, now seen corresponding path program 144 times [2021-06-05 22:01:10,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:10,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6446058] [2021-06-05 22:01:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:10,995 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 22:01:10,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6446058] [2021-06-05 22:01:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6446058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778126113] [2021-06-05 22:01:10,995 INFO L93 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 22:01:11,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:11,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:11,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778126113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:11,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:11,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:11,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824441053] [2021-06-05 22:01:11,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:11,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:11,175 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 22:01:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:11,381 INFO L93 Difference]: Finished difference Result 493 states and 1422 transitions. [2021-06-05 22:01:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:11,381 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 22:01:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:11,382 INFO L225 Difference]: With dead ends: 493 [2021-06-05 22:01:11,382 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 22:01:11,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 22:01:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 341. [2021-06-05 22:01:11,388 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 22:01:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1062 transitions. [2021-06-05 22:01:11,388 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1062 transitions. Word has length 20 [2021-06-05 22:01:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:11,388 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1062 transitions. [2021-06-05 22:01:11,389 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 22:01:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1062 transitions. [2021-06-05 22:01:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:11,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:11,389 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:11,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 22:01:11,589 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:11,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2031951093, now seen corresponding path program 145 times [2021-06-05 22:01:11,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:11,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259153578] [2021-06-05 22:01:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:11,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:11,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259153578] [2021-06-05 22:01:11,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259153578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:11,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448911625] [2021-06-05 22:01:11,647 INFO 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 22:01:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:11,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:11,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448911625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:11,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:11,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:11,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346153504] [2021-06-05 22:01:11,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:11,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:11,883 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 22:01:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:12,189 INFO L93 Difference]: Finished difference Result 499 states and 1423 transitions. [2021-06-05 22:01:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:12,189 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 22:01:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:12,190 INFO L225 Difference]: With dead ends: 499 [2021-06-05 22:01:12,190 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 22:01:12,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 22:01:12,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 344. [2021-06-05 22:01:12,193 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 22:01:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1064 transitions. [2021-06-05 22:01:12,194 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1064 transitions. Word has length 20 [2021-06-05 22:01:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:12,194 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1064 transitions. [2021-06-05 22:01:12,194 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 22:01:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1064 transitions. [2021-06-05 22:01:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:12,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:12,194 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:12,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 22:01:12,395 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:12,395 INFO L82 PathProgramCache]: Analyzing trace with hash 213357067, now seen corresponding path program 146 times [2021-06-05 22:01:12,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:12,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310687440] [2021-06-05 22:01:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:12,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:12,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310687440] [2021-06-05 22:01:12,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310687440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:12,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881568075] [2021-06-05 22:01:12,456 INFO L93 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 22:01:12,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:12,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:12,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881568075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:12,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:12,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:12,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202956731] [2021-06-05 22:01:12,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:12,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:12,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:12,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:12,675 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 22:01:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:12,806 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-06-05 22:01:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:12,807 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 22:01:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:12,807 INFO L225 Difference]: With dead ends: 461 [2021-06-05 22:01:12,807 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 22:01:12,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 22:01:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 337. [2021-06-05 22:01:12,810 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 22:01:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1046 transitions. [2021-06-05 22:01:12,811 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1046 transitions. Word has length 20 [2021-06-05 22:01:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:12,811 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1046 transitions. [2021-06-05 22:01:12,811 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 22:01:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1046 transitions. [2021-06-05 22:01:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:12,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:12,812 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:13,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-06-05 22:01:13,012 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1505699467, now seen corresponding path program 147 times [2021-06-05 22:01:13,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:13,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415517108] [2021-06-05 22:01:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:13,072 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 22:01:13,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415517108] [2021-06-05 22:01:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415517108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206710669] [2021-06-05 22:01:13,072 INFO L93 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 22:01:13,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:13,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:13,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:13,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206710669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:13,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:13,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608191241] [2021-06-05 22:01:13,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:13,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:13,287 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 22:01:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:13,455 INFO L93 Difference]: Finished difference Result 424 states and 1261 transitions. [2021-06-05 22:01:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:13,455 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 22:01:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:13,456 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:01:13,456 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 22:01:13,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 22:01:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 334. [2021-06-05 22:01:13,459 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 22:01:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1031 transitions. [2021-06-05 22:01:13,459 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1031 transitions. Word has length 20 [2021-06-05 22:01:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:13,459 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1031 transitions. [2021-06-05 22:01:13,459 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 22:01:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1031 transitions. [2021-06-05 22:01:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:13,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:13,460 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:13,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1497 [2021-06-05 22:01:13,660 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:13,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash 234093595, now seen corresponding path program 148 times [2021-06-05 22:01:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:13,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875432545] [2021-06-05 22:01:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:13,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875432545] [2021-06-05 22:01:13,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875432545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919697075] [2021-06-05 22:01:13,729 INFO L93 rtionOrderModulation]: Changing 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 22:01:13,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:13,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:13,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919697075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:13,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:13,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299881064] [2021-06-05 22:01:13,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:13,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:13,953 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 22:01:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:14,207 INFO L93 Difference]: Finished difference Result 461 states and 1335 transitions. [2021-06-05 22:01:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:14,207 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 22:01:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:14,208 INFO L225 Difference]: With dead ends: 461 [2021-06-05 22:01:14,208 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 22:01:14,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 22:01:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 344. [2021-06-05 22:01:14,211 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 22:01:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1058 transitions. [2021-06-05 22:01:14,212 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1058 transitions. Word has length 20 [2021-06-05 22:01:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:14,212 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1058 transitions. [2021-06-05 22:01:14,212 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 22:01:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1058 transitions. [2021-06-05 22:01:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:14,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:14,213 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:14,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-06-05 22:01:14,415 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:14,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1681330331, now seen corresponding path program 149 times [2021-06-05 22:01:14,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:14,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205635098] [2021-06-05 22:01:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:14,473 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 22:01:14,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:14,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205635098] [2021-06-05 22:01:14,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205635098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:14,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518209424] [2021-06-05 22:01:14,473 INFO L93 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 22:01:14,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:14,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:14,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:14,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:14,642 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 22:01:14,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518209424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:14,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:14,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:14,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693243151] [2021-06-05 22:01:14,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:14,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:14,643 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 22:01:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:14,895 INFO L93 Difference]: Finished difference Result 438 states and 1296 transitions. [2021-06-05 22:01:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:14,896 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 22:01:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:14,896 INFO L225 Difference]: With dead ends: 438 [2021-06-05 22:01:14,896 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 22:01:14,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 22:01:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 333. [2021-06-05 22:01:14,900 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 22:01:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-06-05 22:01:14,900 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-06-05 22:01:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:14,900 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-06-05 22:01:14,900 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 22:01:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-06-05 22:01:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:14,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:14,901 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:15,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-06-05 22:01:15,101 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1784764021, now seen corresponding path program 150 times [2021-06-05 22:01:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:15,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979233610] [2021-06-05 22:01:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:15,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:15,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979233610] [2021-06-05 22:01:15,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979233610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:15,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955952176] [2021-06-05 22:01:15,162 INFO L93 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 22:01:15,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:15,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:15,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:15,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955952176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:15,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:15,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:15,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498028214] [2021-06-05 22:01:15,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:15,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:15,385 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 22:01:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:15,607 INFO L93 Difference]: Finished difference Result 378 states and 1133 transitions. [2021-06-05 22:01:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:15,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:15,608 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:01:15,608 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:01:15,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:01:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2021-06-05 22:01:15,611 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 22:01:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-06-05 22:01:15,611 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-06-05 22:01:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:15,612 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-06-05 22:01:15,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-06-05 22:01:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:15,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:15,612 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:15,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:15,813 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1033363583, now seen corresponding path program 151 times [2021-06-05 22:01:15,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:15,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403709423] [2021-06-05 22:01:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:15,887 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 22:01:15,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:15,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403709423] [2021-06-05 22:01:15,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403709423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:15,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370304892] [2021-06-05 22:01:15,887 INFO 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 22:01:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:15,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:16,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370304892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:16,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:16,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:16,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431879966] [2021-06-05 22:01:16,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:16,063 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 22:01:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:16,322 INFO L93 Difference]: Finished difference Result 403 states and 1185 transitions. [2021-06-05 22:01:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:16,322 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 22:01:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:16,323 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:01:16,323 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:01:16,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:01:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 345. [2021-06-05 22:01:16,326 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 22:01:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1058 transitions. [2021-06-05 22:01:16,327 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1058 transitions. Word has length 20 [2021-06-05 22:01:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:16,327 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1058 transitions. [2021-06-05 22:01:16,327 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 22:01:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1058 transitions. [2021-06-05 22:01:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:16,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:16,327 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:16,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1544,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:16,529 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1346179787, now seen corresponding path program 152 times [2021-06-05 22:01:16,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:16,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288847009] [2021-06-05 22:01:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:16,585 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 22:01:16,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:16,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288847009] [2021-06-05 22:01:16,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288847009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:16,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115393273] [2021-06-05 22:01:16,586 INFO L93 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 22:01:16,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:16,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:16,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115393273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:16,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:16,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:16,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502005911] [2021-06-05 22:01:16,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:16,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:16,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:16,780 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 22:01:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:16,962 INFO L93 Difference]: Finished difference Result 374 states and 1131 transitions. [2021-06-05 22:01:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:16,962 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 22:01:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:16,963 INFO L225 Difference]: With dead ends: 374 [2021-06-05 22:01:16,963 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 22:01:16,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 22:01:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 332. [2021-06-05 22:01:16,966 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 22:01:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-06-05 22:01:16,966 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-06-05 22:01:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:16,967 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-06-05 22:01:16,967 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 22:01:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-06-05 22:01:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:16,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:16,967 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:17,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-06-05 22:01:17,168 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821461, now seen corresponding path program 153 times [2021-06-05 22:01:17,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:17,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500528769] [2021-06-05 22:01:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:17,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500528769] [2021-06-05 22:01:17,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500528769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529514756] [2021-06-05 22:01:17,232 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 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 22:01:17,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:17,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529514756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:17,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:17,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251399641] [2021-06-05 22:01:17,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:17,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:17,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:17,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:17,391 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 22:01:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:17,563 INFO L93 Difference]: Finished difference Result 451 states and 1333 transitions. [2021-06-05 22:01:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:17,563 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 22:01:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:17,563 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:01:17,564 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:01:17,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:01:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 342. [2021-06-05 22:01:17,567 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 22:01:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1066 transitions. [2021-06-05 22:01:17,567 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1066 transitions. Word has length 20 [2021-06-05 22:01:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:17,567 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1066 transitions. [2021-06-05 22:01:17,567 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 22:01:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1066 transitions. [2021-06-05 22:01:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:17,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:17,568 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:17,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1563,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:17,768 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1202238113, now seen corresponding path program 154 times [2021-06-05 22:01:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:17,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664079907] [2021-06-05 22:01:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:17,826 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 22:01:17,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664079907] [2021-06-05 22:01:17,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664079907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62181478] [2021-06-05 22:01:17,826 INFO L93 rtionOrderModulation]: Changing 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 22:01:17,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:17,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62181478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:17,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:17,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:17,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801055837] [2021-06-05 22:01:17,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:17,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:17,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:17,981 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 22:01:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:18,135 INFO L93 Difference]: Finished difference Result 457 states and 1334 transitions. [2021-06-05 22:01:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:18,136 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 22:01:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:18,136 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:01:18,136 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:01:18,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:01:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 345. [2021-06-05 22:01:18,140 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 22:01:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 22:01:18,140 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 22:01:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:18,140 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 22:01:18,140 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 22:01:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 22:01:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:18,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:18,141 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:18,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1573 [2021-06-05 22:01:18,341 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash -847421023, now seen corresponding path program 155 times [2021-06-05 22:01:18,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:18,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712021999] [2021-06-05 22:01:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:18,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:18,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712021999] [2021-06-05 22:01:18,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712021999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:18,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164792878] [2021-06-05 22:01:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:01:18,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:18,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:18,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:18,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:18,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164792878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:18,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:18,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:18,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238598505] [2021-06-05 22:01:18,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:18,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:18,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:18,635 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 22:01:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:18,918 INFO L93 Difference]: Finished difference Result 509 states and 1476 transitions. [2021-06-05 22:01:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:18,919 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 22:01:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:18,919 INFO L225 Difference]: With dead ends: 509 [2021-06-05 22:01:18,919 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 22:01:18,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 22:01:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 348. [2021-06-05 22:01:18,924 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 22:01:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1083 transitions. [2021-06-05 22:01:18,925 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1083 transitions. Word has length 20 [2021-06-05 22:01:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:18,940 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1083 transitions. [2021-06-05 22:01:18,941 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 22:01:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1083 transitions. [2021-06-05 22:01:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:18,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:18,941 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:19,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-05 22:01:19,155 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:19,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:19,155 INFO L82 PathProgramCache]: Analyzing trace with hash 444921377, now seen corresponding path program 156 times [2021-06-05 22:01:19,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:19,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875203604] [2021-06-05 22:01:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:19,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875203604] [2021-06-05 22:01:19,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875203604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944429151] [2021-06-05 22:01:19,223 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 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 22:01:19,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:19,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:19,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944429151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:19,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:19,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:19,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706089007] [2021-06-05 22:01:19,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:19,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:19,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:19,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:19,386 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 22:01:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:19,595 INFO L93 Difference]: Finished difference Result 472 states and 1394 transitions. [2021-06-05 22:01:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:19,596 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 22:01:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:19,597 INFO L225 Difference]: With dead ends: 472 [2021-06-05 22:01:19,597 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 22:01:19,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 22:01:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 345. [2021-06-05 22:01:19,600 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 22:01:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 22:01:19,600 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 22:01:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:19,601 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 22:01:19,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 22:01:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:19,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:19,601 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:19,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-06-05 22:01:19,802 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:19,802 INFO L82 PathProgramCache]: Analyzing trace with hash -826684495, now seen corresponding path program 157 times [2021-06-05 22:01:19,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:19,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39687526] [2021-06-05 22:01:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:19,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:19,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39687526] [2021-06-05 22:01:19,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39687526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:19,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081874857] [2021-06-05 22:01:19,861 INFO 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 22:01:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:19,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:20,034 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 22:01:20,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081874857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:20,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:20,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:20,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693873803] [2021-06-05 22:01:20,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:20,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:20,035 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 22:01:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:20,207 INFO L93 Difference]: Finished difference Result 497 states and 1428 transitions. [2021-06-05 22:01:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:20,207 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 22:01:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:20,208 INFO L225 Difference]: With dead ends: 497 [2021-06-05 22:01:20,208 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 22:01:20,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 22:01:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 349. [2021-06-05 22:01:20,212 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 22:01:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1082 transitions. [2021-06-05 22:01:20,212 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1082 transitions. Word has length 20 [2021-06-05 22:01:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:20,212 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1082 transitions. [2021-06-05 22:01:20,212 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 22:01:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1082 transitions. [2021-06-05 22:01:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:20,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:20,213 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:20,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:20,413 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1552858875, now seen corresponding path program 158 times [2021-06-05 22:01:20,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:20,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380771615] [2021-06-05 22:01:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:20,473 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 22:01:20,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:20,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380771615] [2021-06-05 22:01:20,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380771615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:20,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809757745] [2021-06-05 22:01:20,473 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 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 22:01:20,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:20,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:20,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809757745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:20,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:20,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:20,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490960684] [2021-06-05 22:01:20,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:20,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:20,646 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 22:01:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:20,897 INFO L93 Difference]: Finished difference Result 503 states and 1449 transitions. [2021-06-05 22:01:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:20,897 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 22:01:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:20,898 INFO L225 Difference]: With dead ends: 503 [2021-06-05 22:01:20,898 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 22:01:20,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 22:01:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 346. [2021-06-05 22:01:20,902 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 22:01:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1072 transitions. [2021-06-05 22:01:20,902 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1072 transitions. Word has length 20 [2021-06-05 22:01:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:20,902 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1072 transitions. [2021-06-05 22:01:20,902 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 22:01:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1072 transitions. [2021-06-05 22:01:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:20,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:20,903 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:21,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:21,103 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1335117643, now seen corresponding path program 159 times [2021-06-05 22:01:21,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:21,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534006215] [2021-06-05 22:01:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:21,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:21,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534006215] [2021-06-05 22:01:21,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534006215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:21,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693038576] [2021-06-05 22:01:21,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:01:21,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:21,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693038576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:21,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:21,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:21,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712533111] [2021-06-05 22:01:21,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:21,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:21,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:21,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:21,387 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 22:01:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:21,599 INFO L93 Difference]: Finished difference Result 433 states and 1294 transitions. [2021-06-05 22:01:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:21,600 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 22:01:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:21,600 INFO L225 Difference]: With dead ends: 433 [2021-06-05 22:01:21,600 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 22:01:21,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 22:01:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 347. [2021-06-05 22:01:21,603 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 22:01:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1074 transitions. [2021-06-05 22:01:21,604 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1074 transitions. Word has length 20 [2021-06-05 22:01:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:21,604 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1074 transitions. [2021-06-05 22:01:21,604 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 22:01:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1074 transitions. [2021-06-05 22:01:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:21,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:21,605 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:21,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1626,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:21,808 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1667507253, now seen corresponding path program 160 times [2021-06-05 22:01:21,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:21,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592057589] [2021-06-05 22:01:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:21,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:21,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592057589] [2021-06-05 22:01:21,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592057589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:21,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109329358] [2021-06-05 22:01:21,872 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 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 22:01:21,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:21,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:21,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109329358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:22,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:22,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605186751] [2021-06-05 22:01:22,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:22,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:22,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:22,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:22,052 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 22:01:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:22,279 INFO L93 Difference]: Finished difference Result 421 states and 1261 transitions. [2021-06-05 22:01:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:22,279 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 22:01:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:22,280 INFO L225 Difference]: With dead ends: 421 [2021-06-05 22:01:22,280 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 22:01:22,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 22:01:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 336. [2021-06-05 22:01:22,283 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 22:01:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-06-05 22:01:22,283 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-06-05 22:01:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:22,283 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-06-05 22:01:22,283 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 22:01:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-06-05 22:01:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:22,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:22,284 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:22,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:22,484 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:22,485 INFO L82 PathProgramCache]: Analyzing trace with hash 731595007, now seen corresponding path program 161 times [2021-06-05 22:01:22,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:22,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256206242] [2021-06-05 22:01:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:22,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256206242] [2021-06-05 22:01:22,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256206242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609273044] [2021-06-05 22:01:22,557 INFO L93 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 22:01:22,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:22,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609273044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:22,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:22,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929103317] [2021-06-05 22:01:22,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:22,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:22,745 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 22:01:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:22,954 INFO L93 Difference]: Finished difference Result 376 states and 1139 transitions. [2021-06-05 22:01:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:22,954 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 22:01:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:22,955 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:01:22,955 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:01:22,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:01:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2021-06-05 22:01:22,958 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 22:01:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1025 transitions. [2021-06-05 22:01:22,958 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1025 transitions. Word has length 20 [2021-06-05 22:01:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:22,958 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1025 transitions. [2021-06-05 22:01:22,958 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 22:01:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1025 transitions. [2021-06-05 22:01:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:22,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:22,959 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:23,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-06-05 22:01:23,159 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 88396993, now seen corresponding path program 162 times [2021-06-05 22:01:23,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:23,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699750068] [2021-06-05 22:01:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:23,215 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 22:01:23,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:23,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699750068] [2021-06-05 22:01:23,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699750068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:23,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258635272] [2021-06-05 22:01:23,216 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 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 22:01:23,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:01:23,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:23,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:23,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258635272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:23,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:23,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:23,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365261984] [2021-06-05 22:01:23,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:23,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:23,389 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 22:01:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:23,626 INFO L93 Difference]: Finished difference Result 421 states and 1233 transitions. [2021-06-05 22:01:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:23,626 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 22:01:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:23,627 INFO L225 Difference]: With dead ends: 421 [2021-06-05 22:01:23,627 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 22:01:23,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 22:01:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 347. [2021-06-05 22:01:23,630 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 22:01:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1064 transitions. [2021-06-05 22:01:23,631 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1064 transitions. Word has length 20 [2021-06-05 22:01:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:23,631 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1064 transitions. [2021-06-05 22:01:23,631 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 22:01:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1064 transitions. [2021-06-05 22:01:23,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:23,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:23,631 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:23,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-06-05 22:01:23,832 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1827026933, now seen corresponding path program 163 times [2021-06-05 22:01:23,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:23,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458339057] [2021-06-05 22:01:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:23,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:23,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458339057] [2021-06-05 22:01:23,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458339057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:23,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034659616] [2021-06-05 22:01:23,890 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 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 22:01:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:23,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:24,080 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 22:01:24,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034659616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:24,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:24,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:24,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954862991] [2021-06-05 22:01:24,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:24,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:24,081 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 22:01:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:24,288 INFO L93 Difference]: Finished difference Result 427 states and 1254 transitions. [2021-06-05 22:01:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:24,288 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 22:01:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:24,289 INFO L225 Difference]: With dead ends: 427 [2021-06-05 22:01:24,289 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 22:01:24,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 22:01:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 345. [2021-06-05 22:01:24,293 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 22:01:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2021-06-05 22:01:24,294 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2021-06-05 22:01:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:24,294 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2021-06-05 22:01:24,294 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 22:01:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2021-06-05 22:01:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:24,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:24,295 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:24,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-05 22:01:24,505 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash -786791135, now seen corresponding path program 164 times [2021-06-05 22:01:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:24,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512852475] [2021-06-05 22:01:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:24,579 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 22:01:24,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:24,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512852475] [2021-06-05 22:01:24,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512852475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:24,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013441287] [2021-06-05 22:01:24,580 INFO L93 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 22:01:24,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:24,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:24,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013441287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:24,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:24,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:24,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273872136] [2021-06-05 22:01:24,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:24,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:24,743 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 22:01:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:24,935 INFO L93 Difference]: Finished difference Result 396 states and 1189 transitions. [2021-06-05 22:01:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:24,936 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 22:01:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:24,936 INFO L225 Difference]: With dead ends: 396 [2021-06-05 22:01:24,936 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:01:24,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:01:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 332. [2021-06-05 22:01:24,944 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 22:01:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-06-05 22:01:24,945 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-06-05 22:01:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:24,945 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-06-05 22:01:24,945 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 22:01:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-06-05 22:01:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:24,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:24,946 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:25,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 22:01:25,163 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 812958331, now seen corresponding path program 165 times [2021-06-05 22:01:25,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:25,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330642746] [2021-06-05 22:01:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:25,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:25,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330642746] [2021-06-05 22:01:25,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330642746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:25,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322617810] [2021-06-05 22:01:25,211 INFO L93 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 22:01:25,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:25,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:25,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:25,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:25,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322617810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:25,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:25,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988977087] [2021-06-05 22:01:25,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:25,359 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 22:01:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:25,507 INFO L93 Difference]: Finished difference Result 366 states and 1100 transitions. [2021-06-05 22:01:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:25,507 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 22:01:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:25,508 INFO L225 Difference]: With dead ends: 366 [2021-06-05 22:01:25,508 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:01:25,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:01:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 336. [2021-06-05 22:01:25,511 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 22:01:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1031 transitions. [2021-06-05 22:01:25,511 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1031 transitions. Word has length 20 [2021-06-05 22:01:25,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:25,511 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1031 transitions. [2021-06-05 22:01:25,511 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 22:01:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1031 transitions. [2021-06-05 22:01:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:25,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:25,512 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:25,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:25,712 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:25,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1564358769, now seen corresponding path program 166 times [2021-06-05 22:01:25,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:25,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407225605] [2021-06-05 22:01:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:25,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:25,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407225605] [2021-06-05 22:01:25,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407225605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:25,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900880983] [2021-06-05 22:01:25,765 INFO L93 rtionOrderModulation]: Changing 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 22:01:25,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900880983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:25,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:25,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:25,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547194997] [2021-06-05 22:01:25,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:25,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:25,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:25,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:25,933 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 22:01:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:26,165 INFO L93 Difference]: Finished difference Result 391 states and 1152 transitions. [2021-06-05 22:01:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:26,165 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 22:01:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:26,166 INFO L225 Difference]: With dead ends: 391 [2021-06-05 22:01:26,166 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 22:01:26,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 22:01:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 346. [2021-06-05 22:01:26,170 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 22:01:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1058 transitions. [2021-06-05 22:01:26,171 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1058 transitions. Word has length 20 [2021-06-05 22:01:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:26,171 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1058 transitions. [2021-06-05 22:01:26,171 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 22:01:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1058 transitions. [2021-06-05 22:01:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:26,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:26,172 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:26,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-06-05 22:01:26,372 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash -351065157, now seen corresponding path program 167 times [2021-06-05 22:01:26,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:26,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800491636] [2021-06-05 22:01:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:26,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800491636] [2021-06-05 22:01:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800491636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234916890] [2021-06-05 22:01:26,424 INFO L93 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 22:01:26,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:26,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:26,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:26,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234916890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:26,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:26,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933949945] [2021-06-05 22:01:26,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:26,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:26,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:26,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:26,565 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 22:01:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:26,679 INFO L93 Difference]: Finished difference Result 362 states and 1098 transitions. [2021-06-05 22:01:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:26,680 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 22:01:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:26,680 INFO L225 Difference]: With dead ends: 362 [2021-06-05 22:01:26,680 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 22:01:26,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 22:01:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 334. [2021-06-05 22:01:26,683 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 22:01:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-06-05 22:01:26,684 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-06-05 22:01:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:26,684 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-06-05 22:01:26,684 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 22:01:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-06-05 22:01:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:26,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:26,684 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:26,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:26,885 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash -548069861, now seen corresponding path program 168 times [2021-06-05 22:01:26,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:26,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57183284] [2021-06-05 22:01:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:26,936 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 22:01:26,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57183284] [2021-06-05 22:01:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57183284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280493819] [2021-06-05 22:01:26,937 INFO L93 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 22:01:27,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:01:27,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280493819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:27,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:27,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:27,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612681368] [2021-06-05 22:01:27,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:27,095 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 22:01:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:27,231 INFO L93 Difference]: Finished difference Result 397 states and 1167 transitions. [2021-06-05 22:01:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:27,232 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 22:01:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:27,232 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:01:27,232 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 22:01:27,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 22:01:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 348. [2021-06-05 22:01:27,236 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 22:01:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1065 transitions. [2021-06-05 22:01:27,236 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1065 transitions. Word has length 20 [2021-06-05 22:01:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:27,236 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1065 transitions. [2021-06-05 22:01:27,236 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 22:01:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1065 transitions. [2021-06-05 22:01:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:27,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:27,237 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:27,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 22:01:27,438 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:27,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473509, now seen corresponding path program 169 times [2021-06-05 22:01:27,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:27,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635416720] [2021-06-05 22:01:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:27,490 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 22:01:27,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:27,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635416720] [2021-06-05 22:01:27,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635416720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:27,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239016491] [2021-06-05 22:01:27,491 INFO 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 22:01:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:27,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:27,641 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 22:01:27,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239016491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:27,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:27,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:01:27,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760958916] [2021-06-05 22:01:27,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:01:27,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:01:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:01:27,642 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 22:01:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:27,784 INFO L93 Difference]: Finished difference Result 397 states and 1173 transitions. [2021-06-05 22:01:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:27,784 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 22:01:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:27,784 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:01:27,785 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:01:27,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:27,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:01:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 346. [2021-06-05 22:01:27,788 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 22:01:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1060 transitions. [2021-06-05 22:01:27,788 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1060 transitions. Word has length 20 [2021-06-05 22:01:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:27,788 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1060 transitions. [2021-06-05 22:01:27,788 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 22:01:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1060 transitions. [2021-06-05 22:01:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:27,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:27,789 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:27,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:27,991 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1423257989, now seen corresponding path program 170 times [2021-06-05 22:01:27,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:27,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549539580] [2021-06-05 22:01:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:28,061 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 22:01:28,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:28,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549539580] [2021-06-05 22:01:28,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549539580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600094578] [2021-06-05 22:01:28,061 INFO L93 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 22:01:28,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:28,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:28,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:28,179 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 22:01:28,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600094578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:28,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:01:28,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360128157] [2021-06-05 22:01:28,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:01:28,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:01:28,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:01:28,180 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 22:01:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:28,296 INFO L93 Difference]: Finished difference Result 372 states and 1123 transitions. [2021-06-05 22:01:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:28,296 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 22:01:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:28,296 INFO L225 Difference]: With dead ends: 372 [2021-06-05 22:01:28,296 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 22:01:28,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 22:01:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 334. [2021-06-05 22:01:28,299 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 22:01:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-06-05 22:01:28,300 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-06-05 22:01:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:28,300 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-06-05 22:01:28,300 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 22:01:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-06-05 22:01:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:28,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:28,301 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:28,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-05 22:01:28,501 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1541923549, now seen corresponding path program 171 times [2021-06-05 22:01:28,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:28,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322758261] [2021-06-05 22:01:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:28,561 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 22:01:28,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:28,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322758261] [2021-06-05 22:01:28,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322758261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965042831] [2021-06-05 22:01:28,562 INFO L93 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 22:01:28,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:28,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:28,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965042831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:28,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:28,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361531183] [2021-06-05 22:01:28,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:28,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:28,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:28,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:28,807 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 22:01:29,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:29,263 INFO L93 Difference]: Finished difference Result 550 states and 1636 transitions. [2021-06-05 22:01:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:29,263 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 22:01:29,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:29,264 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:01:29,264 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 22:01:29,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 22:01:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-06-05 22:01:29,267 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 22:01:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 22:01:29,268 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 22:01:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:29,268 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 22:01:29,268 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 22:01:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 22:01:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:29,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:29,269 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:29,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:29,469 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1259136025, now seen corresponding path program 172 times [2021-06-05 22:01:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:29,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096334576] [2021-06-05 22:01:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:29,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:29,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096334576] [2021-06-05 22:01:29,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096334576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:29,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151195869] [2021-06-05 22:01:29,528 INFO L93 rtionOrderModulation]: Changing 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 22:01:29,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:29,753 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 22:01:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151195869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:29,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:29,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:29,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174903363] [2021-06-05 22:01:29,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:29,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:29,754 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 22:01:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:30,121 INFO L93 Difference]: Finished difference Result 556 states and 1643 transitions. [2021-06-05 22:01:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:30,121 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 22:01:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:30,122 INFO L225 Difference]: With dead ends: 556 [2021-06-05 22:01:30,122 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 22:01:30,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:01:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 22:01:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-06-05 22:01:30,126 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 22:01:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1057 transitions. [2021-06-05 22:01:30,126 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1057 transitions. Word has length 20 [2021-06-05 22:01:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:30,126 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1057 transitions. [2021-06-05 22:01:30,126 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 22:01:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1057 transitions. [2021-06-05 22:01:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:30,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:30,127 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:30,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1723 [2021-06-05 22:01:30,327 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1796991603, now seen corresponding path program 173 times [2021-06-05 22:01:30,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:30,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537804799] [2021-06-05 22:01:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:30,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:30,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537804799] [2021-06-05 22:01:30,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537804799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:30,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306560765] [2021-06-05 22:01:30,382 INFO L93 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 22:01:30,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:30,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:30,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:30,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:30,583 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 22:01:30,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306560765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:30,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:30,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98764890] [2021-06-05 22:01:30,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:30,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:30,583 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 22:01:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:30,889 INFO L93 Difference]: Finished difference Result 520 states and 1561 transitions. [2021-06-05 22:01:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:30,890 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 22:01:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:30,890 INFO L225 Difference]: With dead ends: 520 [2021-06-05 22:01:30,890 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 22:01:30,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 22:01:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 339. [2021-06-05 22:01:30,894 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 22:01:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1046 transitions. [2021-06-05 22:01:30,894 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1046 transitions. Word has length 20 [2021-06-05 22:01:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:30,894 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1046 transitions. [2021-06-05 22:01:30,894 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 22:01:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1046 transitions. [2021-06-05 22:01:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:30,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:30,895 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:31,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 22:01:31,095 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1910230371, now seen corresponding path program 174 times [2021-06-05 22:01:31,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:31,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471369825] [2021-06-05 22:01:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:31,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:31,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471369825] [2021-06-05 22:01:31,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471369825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:31,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255038859] [2021-06-05 22:01:31,154 INFO L93 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 22:01:31,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:31,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:31,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:31,373 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 22:01:31,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255038859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:31,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:31,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:31,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739379803] [2021-06-05 22:01:31,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:31,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:31,374 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 22:01:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:31,730 INFO L93 Difference]: Finished difference Result 552 states and 1621 transitions. [2021-06-05 22:01:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:31,731 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 22:01:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:31,731 INFO L225 Difference]: With dead ends: 552 [2021-06-05 22:01:31,731 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 22:01:31,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 22:01:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 336. [2021-06-05 22:01:31,735 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 22:01:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-06-05 22:01:31,735 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-06-05 22:01:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:31,735 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-06-05 22:01:31,735 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 22:01:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-06-05 22:01:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:31,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:31,736 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:31,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:31,936 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash 711573469, now seen corresponding path program 175 times [2021-06-05 22:01:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:31,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705827837] [2021-06-05 22:01:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:31,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:31,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705827837] [2021-06-05 22:01:31,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705827837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:31,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121836962] [2021-06-05 22:01:31,998 INFO 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 22:01:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:32,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121836962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:32,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:32,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:32,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929419659] [2021-06-05 22:01:32,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:32,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:32,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:32,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:32,217 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 22:01:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:32,486 INFO L93 Difference]: Finished difference Result 562 states and 1666 transitions. [2021-06-05 22:01:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:32,486 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 22:01:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:32,487 INFO L225 Difference]: With dead ends: 562 [2021-06-05 22:01:32,487 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 22:01:32,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 22:01:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 343. [2021-06-05 22:01:32,490 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 22:01:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1062 transitions. [2021-06-05 22:01:32,491 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1062 transitions. Word has length 20 [2021-06-05 22:01:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:32,491 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1062 transitions. [2021-06-05 22:01:32,491 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 22:01:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1062 transitions. [2021-06-05 22:01:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:32,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:32,491 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:32,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1746 [2021-06-05 22:01:32,692 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:32,692 INFO L82 PathProgramCache]: Analyzing trace with hash -782334253, now seen corresponding path program 176 times [2021-06-05 22:01:32,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:32,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002020835] [2021-06-05 22:01:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:32,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:32,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002020835] [2021-06-05 22:01:32,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002020835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:32,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029534134] [2021-06-05 22:01:32,757 INFO L93 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 22:01:32,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:32,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:32,957 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 22:01:32,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029534134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:32,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:32,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:32,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219870848] [2021-06-05 22:01:32,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:32,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:32,958 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 22:01:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:33,252 INFO L93 Difference]: Finished difference Result 568 states and 1673 transitions. [2021-06-05 22:01:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:33,252 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 22:01:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:33,253 INFO L225 Difference]: With dead ends: 568 [2021-06-05 22:01:33,253 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 22:01:33,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 22:01:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 340. [2021-06-05 22:01:33,256 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 22:01:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1051 transitions. [2021-06-05 22:01:33,257 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1051 transitions. Word has length 20 [2021-06-05 22:01:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:33,257 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1051 transitions. [2021-06-05 22:01:33,257 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 22:01:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1051 transitions. [2021-06-05 22:01:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:33,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:33,258 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:33,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:33,458 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -244478675, now seen corresponding path program 177 times [2021-06-05 22:01:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:33,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664632750] [2021-06-05 22:01:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:33,519 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 22:01:33,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:33,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664632750] [2021-06-05 22:01:33,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664632750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:33,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937930345] [2021-06-05 22:01:33,520 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 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 22:01:33,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:33,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:33,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937930345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:33,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:33,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:33,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593143594] [2021-06-05 22:01:33,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:33,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:33,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:33,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:33,749 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 22:01:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:34,007 INFO L93 Difference]: Finished difference Result 532 states and 1591 transitions. [2021-06-05 22:01:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:34,007 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 22:01:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:34,008 INFO L225 Difference]: With dead ends: 532 [2021-06-05 22:01:34,008 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 22:01:34,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 22:01:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 337. [2021-06-05 22:01:34,011 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 22:01:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 22:01:34,012 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 22:01:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:34,012 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 22:01:34,012 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 22:01:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 22:01:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:34,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:34,012 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:34,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-06-05 22:01:34,213 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1764816729, now seen corresponding path program 178 times [2021-06-05 22:01:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:34,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060055047] [2021-06-05 22:01:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:34,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:34,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060055047] [2021-06-05 22:01:34,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060055047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:34,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211425436] [2021-06-05 22:01:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:01:34,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:34,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211425436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:34,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:34,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:34,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846233963] [2021-06-05 22:01:34,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:34,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:34,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:34,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:34,479 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 22:01:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:34,919 INFO L93 Difference]: Finished difference Result 640 states and 1863 transitions. [2021-06-05 22:01:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:34,919 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 22:01:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:34,920 INFO L225 Difference]: With dead ends: 640 [2021-06-05 22:01:34,920 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 22:01:34,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:01:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 22:01:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2021-06-05 22:01:34,926 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 22:01:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1076 transitions. [2021-06-05 22:01:34,926 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1076 transitions. Word has length 20 [2021-06-05 22:01:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:34,927 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1076 transitions. [2021-06-05 22:01:34,927 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 22:01:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1076 transitions. [2021-06-05 22:01:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:34,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:34,927 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:35,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 22:01:35,149 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1036242845, now seen corresponding path program 179 times [2021-06-05 22:01:35,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:35,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822665277] [2021-06-05 22:01:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:35,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:35,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822665277] [2021-06-05 22:01:35,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822665277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:35,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447798095] [2021-06-05 22:01:35,221 INFO L93 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 22:01:35,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:35,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:35,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:35,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:35,490 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 22:01:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447798095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:35,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:35,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:35,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337152263] [2021-06-05 22:01:35,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:35,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:35,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:35,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:35,491 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 22:01:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:36,105 INFO L93 Difference]: Finished difference Result 646 states and 1864 transitions. [2021-06-05 22:01:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:36,105 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 22:01:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:36,106 INFO L225 Difference]: With dead ends: 646 [2021-06-05 22:01:36,106 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 22:01:36,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:01:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 22:01:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-06-05 22:01:36,113 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 22:01:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1078 transitions. [2021-06-05 22:01:36,113 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1078 transitions. Word has length 20 [2021-06-05 22:01:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:36,114 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1078 transitions. [2021-06-05 22:01:36,114 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 22:01:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1078 transitions. [2021-06-05 22:01:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:36,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:36,114 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:36,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:36,315 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1013416291, now seen corresponding path program 180 times [2021-06-05 22:01:36,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:36,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101007168] [2021-06-05 22:01:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:36,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:36,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101007168] [2021-06-05 22:01:36,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101007168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:36,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240446351] [2021-06-05 22:01:36,383 INFO L93 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 22:01:36,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:01:36,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240446351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:36,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:36,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:36,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007557730] [2021-06-05 22:01:36,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:36,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:36,593 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 22:01:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:36,864 INFO L93 Difference]: Finished difference Result 608 states and 1784 transitions. [2021-06-05 22:01:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:36,864 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 22:01:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:36,865 INFO L225 Difference]: With dead ends: 608 [2021-06-05 22:01:36,865 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 22:01:36,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 22:01:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 341. [2021-06-05 22:01:36,869 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 22:01:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1060 transitions. [2021-06-05 22:01:36,869 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1060 transitions. Word has length 20 [2021-06-05 22:01:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:36,869 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1060 transitions. [2021-06-05 22:01:36,869 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 22:01:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1060 transitions. [2021-06-05 22:01:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:36,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:36,870 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:37,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-05 22:01:37,070 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash 278926109, now seen corresponding path program 181 times [2021-06-05 22:01:37,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:37,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363062668] [2021-06-05 22:01:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:37,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:37,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363062668] [2021-06-05 22:01:37,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363062668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125211076] [2021-06-05 22:01:37,138 INFO 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 22:01:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:37,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:37,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125211076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:37,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:37,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516716397] [2021-06-05 22:01:37,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:37,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:37,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:37,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:37,395 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 22:01:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:37,712 INFO L93 Difference]: Finished difference Result 571 states and 1702 transitions. [2021-06-05 22:01:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:37,713 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 22:01:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:37,713 INFO L225 Difference]: With dead ends: 571 [2021-06-05 22:01:37,713 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 22:01:37,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 22:01:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 338. [2021-06-05 22:01:37,717 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 22:01:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1045 transitions. [2021-06-05 22:01:37,717 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1045 transitions. Word has length 20 [2021-06-05 22:01:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:37,718 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1045 transitions. [2021-06-05 22:01:37,718 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 22:01:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1045 transitions. [2021-06-05 22:01:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:37,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:37,718 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:37,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1804,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:37,919 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:37,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:37,919 INFO L82 PathProgramCache]: Analyzing trace with hash -992679763, now seen corresponding path program 182 times [2021-06-05 22:01:37,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:37,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768993402] [2021-06-05 22:01:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:37,982 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 22:01:37,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:37,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768993402] [2021-06-05 22:01:37,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768993402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569102603] [2021-06-05 22:01:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:01:38,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:38,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569102603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:38,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:38,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:38,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883457059] [2021-06-05 22:01:38,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:38,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:38,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:38,196 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 22:01:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:38,752 INFO L93 Difference]: Finished difference Result 608 states and 1776 transitions. [2021-06-05 22:01:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:38,753 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 22:01:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:38,754 INFO L225 Difference]: With dead ends: 608 [2021-06-05 22:01:38,754 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 22:01:38,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:01:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 22:01:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 348. [2021-06-05 22:01:38,757 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 22:01:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1072 transitions. [2021-06-05 22:01:38,758 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1072 transitions. Word has length 20 [2021-06-05 22:01:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:38,758 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1072 transitions. [2021-06-05 22:01:38,758 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 22:01:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1072 transitions. [2021-06-05 22:01:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:38,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:38,759 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:38,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1817,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:38,959 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1386863607, now seen corresponding path program 183 times [2021-06-05 22:01:38,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:38,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944227689] [2021-06-05 22:01:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:39,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:39,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944227689] [2021-06-05 22:01:39,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944227689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566680647] [2021-06-05 22:01:39,032 INFO L93 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 22:01:39,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:39,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:39,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:39,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:39,269 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 22:01:39,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566680647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:39,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:39,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002586412] [2021-06-05 22:01:39,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:39,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:39,270 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 22:01:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:39,731 INFO L93 Difference]: Finished difference Result 585 states and 1737 transitions. [2021-06-05 22:01:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:39,731 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 22:01:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:39,732 INFO L225 Difference]: With dead ends: 585 [2021-06-05 22:01:39,732 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 22:01:39,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:01:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 22:01:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 337. [2021-06-05 22:01:39,736 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 22:01:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 22:01:39,736 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 22:01:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:39,736 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 22:01:39,737 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 22:01:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 22:01:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:39,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:39,737 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:39,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:39,937 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1283429917, now seen corresponding path program 184 times [2021-06-05 22:01:39,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:39,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52662496] [2021-06-05 22:01:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:39,999 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 22:01:40,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:40,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52662496] [2021-06-05 22:01:40,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52662496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787591594] [2021-06-05 22:01:40,000 INFO L93 rtionOrderModulation]: Changing 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 22:01:40,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:40,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:40,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787591594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:40,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:40,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598478351] [2021-06-05 22:01:40,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:40,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:40,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:40,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:40,208 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 22:01:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:40,444 INFO L93 Difference]: Finished difference Result 525 states and 1574 transitions. [2021-06-05 22:01:40,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:40,444 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 22:01:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:40,444 INFO L225 Difference]: With dead ends: 525 [2021-06-05 22:01:40,445 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 22:01:40,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 22:01:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 339. [2021-06-05 22:01:40,448 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 22:01:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1045 transitions. [2021-06-05 22:01:40,448 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1045 transitions. Word has length 20 [2021-06-05 22:01:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:40,448 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1045 transitions. [2021-06-05 22:01:40,449 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 22:01:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1045 transitions. [2021-06-05 22:01:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:40,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:40,449 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:40,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:40,649 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:40,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2034830355, now seen corresponding path program 185 times [2021-06-05 22:01:40,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:40,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28239957] [2021-06-05 22:01:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:40,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:40,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28239957] [2021-06-05 22:01:40,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28239957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536113801] [2021-06-05 22:01:40,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:01:40,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:40,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:40,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:40,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536113801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:40,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851558452] [2021-06-05 22:01:40,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:40,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:40,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:40,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:40,959 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 22:01:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:41,441 INFO L93 Difference]: Finished difference Result 550 states and 1626 transitions. [2021-06-05 22:01:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:41,442 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 22:01:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:41,442 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:01:41,442 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 22:01:41,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 512.1ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:01:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 22:01:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 349. [2021-06-05 22:01:41,446 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 22:01:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-06-05 22:01:41,447 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-06-05 22:01:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:41,447 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-06-05 22:01:41,447 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 22:01:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-06-05 22:01:41,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:41,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:41,447 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:41,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:41,648 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:41,648 INFO L82 PathProgramCache]: Analyzing trace with hash 119406429, now seen corresponding path program 186 times [2021-06-05 22:01:41,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:41,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437078704] [2021-06-05 22:01:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:41,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437078704] [2021-06-05 22:01:41,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437078704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921230228] [2021-06-05 22:01:41,710 INFO L93 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 22:01:41,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:01:41,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:41,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:41,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:41,942 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 22:01:41,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921230228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:41,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:41,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:41,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6758430] [2021-06-05 22:01:41,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:41,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:41,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:41,943 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 22:01:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:42,239 INFO L93 Difference]: Finished difference Result 521 states and 1572 transitions. [2021-06-05 22:01:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:42,239 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 22:01:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:42,240 INFO L225 Difference]: With dead ends: 521 [2021-06-05 22:01:42,240 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 22:01:42,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 22:01:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 336. [2021-06-05 22:01:42,243 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 22:01:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-06-05 22:01:42,244 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-06-05 22:01:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:42,244 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-06-05 22:01:42,244 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 22:01:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-06-05 22:01:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:42,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:42,244 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:42,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1856,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:42,445 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:42,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1789704275, now seen corresponding path program 187 times [2021-06-05 22:01:42,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:42,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697245571] [2021-06-05 22:01:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:42,501 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 22:01:42,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:42,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697245571] [2021-06-05 22:01:42,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697245571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:42,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936396910] [2021-06-05 22:01:42,501 INFO 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 22:01:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:42,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:42,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:42,685 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 22:01:42,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936396910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:42,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:42,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:01:42,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018341928] [2021-06-05 22:01:42,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:01:42,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:42,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:01:42,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:01:42,686 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 22:01:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:42,964 INFO L93 Difference]: Finished difference Result 615 states and 1779 transitions. [2021-06-05 22:01:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:42,965 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 22:01:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:42,965 INFO L225 Difference]: With dead ends: 615 [2021-06-05 22:01:42,966 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 22:01:42,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 22:01:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 338. [2021-06-05 22:01:42,969 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 22:01:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1040 transitions. [2021-06-05 22:01:42,970 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1040 transitions. Word has length 20 [2021-06-05 22:01:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:42,970 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1040 transitions. [2021-06-05 22:01:42,970 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 22:01:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1040 transitions. [2021-06-05 22:01:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:42,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:42,970 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:43,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-06-05 22:01:43,171 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:43,171 INFO L82 PathProgramCache]: Analyzing trace with hash 222651827, now seen corresponding path program 188 times [2021-06-05 22:01:43,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:43,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784738568] [2021-06-05 22:01:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:43,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:43,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784738568] [2021-06-05 22:01:43,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784738568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:43,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454020780] [2021-06-05 22:01:43,227 INFO L93 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 22:01:43,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:43,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454020780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:43,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:43,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:43,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002715383] [2021-06-05 22:01:43,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:43,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:43,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:43,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:43,436 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 22:01:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:43,804 INFO L93 Difference]: Finished difference Result 576 states and 1700 transitions. [2021-06-05 22:01:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:43,805 INFO L225 Difference]: With dead ends: 576 [2021-06-05 22:01:43,805 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 22:01:43,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 22:01:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 340. [2021-06-05 22:01:43,808 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 22:01:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1045 transitions. [2021-06-05 22:01:43,809 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1045 transitions. Word has length 20 [2021-06-05 22:01:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:43,809 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1045 transitions. [2021-06-05 22:01:43,809 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 22:01:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1045 transitions. [2021-06-05 22:01:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:43,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:43,810 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:44,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:44,011 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:44,012 INFO L82 PathProgramCache]: Analyzing trace with hash 974052265, now seen corresponding path program 189 times [2021-06-05 22:01:44,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:44,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325375236] [2021-06-05 22:01:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:44,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:44,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325375236] [2021-06-05 22:01:44,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325375236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:44,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61728910] [2021-06-05 22:01:44,070 INFO L93 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 22:01:44,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:44,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61728910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:44,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499303280] [2021-06-05 22:01:44,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:44,312 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 22:01:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:44,825 INFO L93 Difference]: Finished difference Result 601 states and 1752 transitions. [2021-06-05 22:01:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:44,825 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 22:01:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:44,826 INFO L225 Difference]: With dead ends: 601 [2021-06-05 22:01:44,826 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 22:01:44,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:01:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 22:01:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 350. [2021-06-05 22:01:44,830 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 22:01:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1072 transitions. [2021-06-05 22:01:44,831 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1072 transitions. Word has length 20 [2021-06-05 22:01:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:44,831 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1072 transitions. [2021-06-05 22:01:44,831 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 22:01:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1072 transitions. [2021-06-05 22:01:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:44,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:44,832 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:45,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-06-05 22:01:45,034 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -941371661, now seen corresponding path program 190 times [2021-06-05 22:01:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:45,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878979879] [2021-06-05 22:01:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:45,099 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 22:01:45,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:45,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878979879] [2021-06-05 22:01:45,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878979879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237554362] [2021-06-05 22:01:45,100 INFO L93 rtionOrderModulation]: Changing 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 22:01:45,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:45,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237554362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:45,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242920335] [2021-06-05 22:01:45,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:45,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:45,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:45,329 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 22:01:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:45,638 INFO L93 Difference]: Finished difference Result 572 states and 1698 transitions. [2021-06-05 22:01:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:45,639 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 22:01:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:45,640 INFO L225 Difference]: With dead ends: 572 [2021-06-05 22:01:45,640 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 22:01:45,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 22:01:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 335. [2021-06-05 22:01:45,643 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 22:01:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-06-05 22:01:45,644 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-06-05 22:01:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:45,644 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-06-05 22:01:45,644 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 22:01:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-06-05 22:01:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:45,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:45,644 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:45,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1889 [2021-06-05 22:01:45,845 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1839029821, now seen corresponding path program 191 times [2021-06-05 22:01:45,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:45,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604322912] [2021-06-05 22:01:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:45,917 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 22:01:45,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604322912] [2021-06-05 22:01:45,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604322912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996459363] [2021-06-05 22:01:45,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:01:45,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:45,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:46,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996459363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:46,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:46,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077847763] [2021-06-05 22:01:46,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:46,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:46,135 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 22:01:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:46,381 INFO L93 Difference]: Finished difference Result 433 states and 1285 transitions. [2021-06-05 22:01:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:46,382 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 22:01:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:46,382 INFO L225 Difference]: With dead ends: 433 [2021-06-05 22:01:46,382 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 22:01:46,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 22:01:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 343. [2021-06-05 22:01:46,385 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 22:01:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-06-05 22:01:46,386 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-06-05 22:01:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:46,386 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-06-05 22:01:46,386 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 22:01:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-06-05 22:01:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:46,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:46,387 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:46,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1897,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:46,587 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash 962029753, now seen corresponding path program 192 times [2021-06-05 22:01:46,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:46,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830877620] [2021-06-05 22:01:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:46,659 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 22:01:46,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:46,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830877620] [2021-06-05 22:01:46,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830877620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:46,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984580985] [2021-06-05 22:01:46,660 INFO L93 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 22:01:46,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:46,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:46,881 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 22:01:46,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984580985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:46,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:46,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:46,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670435819] [2021-06-05 22:01:46,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:46,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:46,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:46,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:46,882 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 22:01:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:47,226 INFO L93 Difference]: Finished difference Result 439 states and 1292 transitions. [2021-06-05 22:01:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:47,227 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 22:01:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:47,228 INFO L225 Difference]: With dead ends: 439 [2021-06-05 22:01:47,228 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 22:01:47,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 22:01:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 340. [2021-06-05 22:01:47,232 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 22:01:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 22:01:47,233 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 22:01:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:47,233 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 22:01:47,233 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 22:01:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 22:01:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:47,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:47,234 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:47,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:47,455 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1499885331, now seen corresponding path program 193 times [2021-06-05 22:01:47,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:47,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560364077] [2021-06-05 22:01:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:47,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:47,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560364077] [2021-06-05 22:01:47,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560364077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:47,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147397384] [2021-06-05 22:01:47,526 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 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 22:01:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:47,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:47,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:47,769 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 22:01:47,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147397384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:47,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:47,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:47,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361225340] [2021-06-05 22:01:47,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:47,770 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 22:01:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:48,113 INFO L93 Difference]: Finished difference Result 403 states and 1210 transitions. [2021-06-05 22:01:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:48,114 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 22:01:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:48,114 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:01:48,114 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 22:01:48,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 22:01:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 337. [2021-06-05 22:01:48,118 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 22:01:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-06-05 22:01:48,119 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-06-05 22:01:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:48,119 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-06-05 22:01:48,119 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 22:01:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-06-05 22:01:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:48,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:48,120 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:48,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:48,342 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash -20452723, now seen corresponding path program 194 times [2021-06-05 22:01:48,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:48,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986706199] [2021-06-05 22:01:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:48,413 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 22:01:48,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:48,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986706199] [2021-06-05 22:01:48,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986706199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:48,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114872523] [2021-06-05 22:01:48,413 INFO L93 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 22:01:48,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:48,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:48,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:48,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:48,607 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 22:01:48,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114872523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:48,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:48,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:48,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452491048] [2021-06-05 22:01:48,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:48,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:48,608 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 22:01:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:48,932 INFO L93 Difference]: Finished difference Result 520 states and 1503 transitions. [2021-06-05 22:01:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:48,933 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 22:01:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:48,933 INFO L225 Difference]: With dead ends: 520 [2021-06-05 22:01:48,933 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 22:01:48,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:01:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 22:01:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-06-05 22:01:48,937 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 22:01:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1075 transitions. [2021-06-05 22:01:48,938 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1075 transitions. Word has length 20 [2021-06-05 22:01:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:48,938 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1075 transitions. [2021-06-05 22:01:48,938 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 22:01:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1075 transitions. [2021-06-05 22:01:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:48,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:48,938 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:49,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1927 [2021-06-05 22:01:49,139 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1514360445, now seen corresponding path program 195 times [2021-06-05 22:01:49,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:49,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485435744] [2021-06-05 22:01:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:49,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:49,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485435744] [2021-06-05 22:01:49,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485435744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:49,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595326162] [2021-06-05 22:01:49,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:01:49,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:49,458 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 22:01:49,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595326162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:49,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:49,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:49,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241743234] [2021-06-05 22:01:49,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:49,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:49,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:49,459 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 22:01:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:49,853 INFO L93 Difference]: Finished difference Result 526 states and 1504 transitions. [2021-06-05 22:01:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:49,853 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 22:01:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:49,854 INFO L225 Difference]: With dead ends: 526 [2021-06-05 22:01:49,854 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 22:01:49,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:01:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 22:01:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 348. [2021-06-05 22:01:49,859 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 22:01:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1077 transitions. [2021-06-05 22:01:49,860 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1077 transitions. Word has length 20 [2021-06-05 22:01:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:49,860 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1077 transitions. [2021-06-05 22:01:49,860 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 22:01:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1077 transitions. [2021-06-05 22:01:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:49,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:49,861 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:50,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,080 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash 730947715, now seen corresponding path program 196 times [2021-06-05 22:01:50,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:50,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041785205] [2021-06-05 22:01:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:50,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:50,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041785205] [2021-06-05 22:01:50,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041785205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769195566] [2021-06-05 22:01:50,156 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 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 22:01:50,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:50,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769195566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:50,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:50,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:50,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202351343] [2021-06-05 22:01:50,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:50,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:50,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:50,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:50,403 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 22:01:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:50,626 INFO L93 Difference]: Finished difference Result 488 states and 1424 transitions. [2021-06-05 22:01:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:50,626 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 22:01:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:50,627 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:01:50,627 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 22:01:50,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 22:01:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 341. [2021-06-05 22:01:50,630 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 22:01:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1059 transitions. [2021-06-05 22:01:50,631 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1059 transitions. Word has length 20 [2021-06-05 22:01:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:50,631 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1059 transitions. [2021-06-05 22:01:50,631 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 22:01:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1059 transitions. [2021-06-05 22:01:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:50,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:50,631 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:50,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1943,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,832 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2023290115, now seen corresponding path program 197 times [2021-06-05 22:01:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:50,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856262942] [2021-06-05 22:01:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:50,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856262942] [2021-06-05 22:01:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856262942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165796268] [2021-06-05 22:01:50,895 INFO L93 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 22:01:50,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:50,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:51,136 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 22:01:51,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165796268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:51,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:51,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:51,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468516196] [2021-06-05 22:01:51,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:51,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:51,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:51,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:51,137 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 22:01:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:51,323 INFO L93 Difference]: Finished difference Result 451 states and 1342 transitions. [2021-06-05 22:01:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:51,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:51,324 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:01:51,324 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:01:51,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:01:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 338. [2021-06-05 22:01:51,327 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 22:01:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-06-05 22:01:51,327 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-06-05 22:01:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:51,327 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-06-05 22:01:51,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-06-05 22:01:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:51,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:51,328 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:51,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1957 [2021-06-05 22:01:51,529 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash 751684243, now seen corresponding path program 198 times [2021-06-05 22:01:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:51,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963225701] [2021-06-05 22:01:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:51,619 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 22:01:51,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:51,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963225701] [2021-06-05 22:01:51,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963225701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:51,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165106777] [2021-06-05 22:01:51,619 INFO L93 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 22:01:51,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:51,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165106777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:51,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:51,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:51,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467211978] [2021-06-05 22:01:51,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:51,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:51,917 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 22:01:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:52,278 INFO L93 Difference]: Finished difference Result 488 states and 1416 transitions. [2021-06-05 22:01:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:52,278 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 22:01:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:52,279 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:01:52,279 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 22:01:52,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:01:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 22:01:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 348. [2021-06-05 22:01:52,282 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 22:01:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1071 transitions. [2021-06-05 22:01:52,283 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1071 transitions. Word has length 20 [2021-06-05 22:01:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:52,283 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1071 transitions. [2021-06-05 22:01:52,283 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 22:01:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1071 transitions. [2021-06-05 22:01:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:52,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:52,283 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:52,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-06-05 22:01:52,484 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1163739683, now seen corresponding path program 199 times [2021-06-05 22:01:52,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:52,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357031131] [2021-06-05 22:01:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:52,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:52,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357031131] [2021-06-05 22:01:52,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357031131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:52,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138237915] [2021-06-05 22:01:52,557 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 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 22:01:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:52,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138237915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:52,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:52,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:52,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361711212] [2021-06-05 22:01:52,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:52,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:52,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:52,837 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 22:01:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:53,255 INFO L93 Difference]: Finished difference Result 465 states and 1377 transitions. [2021-06-05 22:01:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:53,256 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 22:01:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:53,257 INFO L225 Difference]: With dead ends: 465 [2021-06-05 22:01:53,257 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 22:01:53,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:01:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 22:01:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 337. [2021-06-05 22:01:53,261 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 22:01:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-06-05 22:01:53,262 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-06-05 22:01:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:53,262 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-06-05 22:01:53,262 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 22:01:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-06-05 22:01:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:53,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:53,263 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:53,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-06-05 22:01:53,484 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:53,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173373, now seen corresponding path program 200 times [2021-06-05 22:01:53,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:53,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982794855] [2021-06-05 22:01:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:53,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982794855] [2021-06-05 22:01:53,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982794855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027143692] [2021-06-05 22:01:53,546 INFO L93 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 22:01:53,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:53,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:53,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027143692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:53,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:53,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:53,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339625789] [2021-06-05 22:01:53,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:53,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:53,765 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 22:01:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:53,996 INFO L93 Difference]: Finished difference Result 405 states and 1214 transitions. [2021-06-05 22:01:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:53,996 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 22:01:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:53,997 INFO L225 Difference]: With dead ends: 405 [2021-06-05 22:01:53,997 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 22:01:53,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 22:01:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 339. [2021-06-05 22:01:54,000 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 22:01:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1044 transitions. [2021-06-05 22:01:54,000 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1044 transitions. Word has length 20 [2021-06-05 22:01:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:54,001 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1044 transitions. [2021-06-05 22:01:54,001 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 22:01:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1044 transitions. [2021-06-05 22:01:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:54,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:54,001 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:54,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:54,202 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:54,202 INFO L82 PathProgramCache]: Analyzing trace with hash -515772935, now seen corresponding path program 201 times [2021-06-05 22:01:54,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:54,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991202107] [2021-06-05 22:01:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:54,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991202107] [2021-06-05 22:01:54,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991202107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991693084] [2021-06-05 22:01:54,277 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 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 22:01:54,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:54,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:54,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:54,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:54,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991693084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:54,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:54,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:54,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139028713] [2021-06-05 22:01:54,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:54,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:54,594 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 22:01:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:54,923 INFO L93 Difference]: Finished difference Result 430 states and 1266 transitions. [2021-06-05 22:01:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:54,923 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 22:01:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:54,924 INFO L225 Difference]: With dead ends: 430 [2021-06-05 22:01:54,924 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 22:01:54,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:01:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 22:01:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-06-05 22:01:54,927 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 22:01:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1071 transitions. [2021-06-05 22:01:54,927 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1071 transitions. Word has length 20 [2021-06-05 22:01:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:54,927 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1071 transitions. [2021-06-05 22:01:54,927 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 22:01:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1071 transitions. [2021-06-05 22:01:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:54,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:54,928 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:55,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 22:01:55,129 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:55,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1863770435, now seen corresponding path program 202 times [2021-06-05 22:01:55,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:55,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665417825] [2021-06-05 22:01:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:55,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:55,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665417825] [2021-06-05 22:01:55,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665417825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:55,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996962733] [2021-06-05 22:01:55,200 INFO L93 rtionOrderModulation]: Changing 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 22:01:55,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:55,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:55,442 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 22:01:55,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996962733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:55,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:55,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:55,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343282935] [2021-06-05 22:01:55,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:55,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:55,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:55,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:55,444 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 22:01:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:55,738 INFO L93 Difference]: Finished difference Result 401 states and 1212 transitions. [2021-06-05 22:01:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:55,739 INFO L225 Difference]: With dead ends: 401 [2021-06-05 22:01:55,739 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:01:55,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:01:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 336. [2021-06-05 22:01:55,743 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 22:01:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-06-05 22:01:55,744 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-06-05 22:01:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:55,744 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-06-05 22:01:55,744 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 22:01:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-06-05 22:01:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:55,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:55,744 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:55,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:55,967 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1081230813, now seen corresponding path program 203 times [2021-06-05 22:01:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:55,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751581280] [2021-06-05 22:01:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:56,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:56,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751581280] [2021-06-05 22:01:56,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751581280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940816236] [2021-06-05 22:01:56,050 INFO L93 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 22:01:56,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:56,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:56,255 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 22:01:56,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940816236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:56,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:56,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142239663] [2021-06-05 22:01:56,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:56,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:56,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:56,255 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 22:01:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:56,470 INFO L93 Difference]: Finished difference Result 475 states and 1405 transitions. [2021-06-05 22:01:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:56,470 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 22:01:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:56,471 INFO L225 Difference]: With dead ends: 475 [2021-06-05 22:01:56,471 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 22:01:56,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 22:01:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 346. [2021-06-05 22:01:56,475 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 22:01:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1079 transitions. [2021-06-05 22:01:56,476 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1079 transitions. Word has length 20 [2021-06-05 22:01:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:56,476 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1079 transitions. [2021-06-05 22:01:56,476 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 22:01:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1079 transitions. [2021-06-05 22:01:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:56,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:56,477 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:56,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-05 22:01:56,681 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1719828761, now seen corresponding path program 204 times [2021-06-05 22:01:56,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:56,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793490553] [2021-06-05 22:01:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:56,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:56,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793490553] [2021-06-05 22:01:56,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793490553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278657105] [2021-06-05 22:01:56,752 INFO L93 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 22:01:56,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:01:56,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:56,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:56,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278657105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:56,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:56,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130717736] [2021-06-05 22:01:56,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:56,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:56,965 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 22:01:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:57,226 INFO L93 Difference]: Finished difference Result 481 states and 1406 transitions. [2021-06-05 22:01:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:57,226 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 22:01:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:57,227 INFO L225 Difference]: With dead ends: 481 [2021-06-05 22:01:57,227 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 22:01:57,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 22:01:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 349. [2021-06-05 22:01:57,231 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 22:01:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 22:01:57,232 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 22:01:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:57,232 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 22:01:57,232 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 22:01:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 22:01:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:57,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:57,233 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:57,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:57,454 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash -329830375, now seen corresponding path program 205 times [2021-06-05 22:01:57,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:57,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145435619] [2021-06-05 22:01:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:57,517 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 22:01:57,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145435619] [2021-06-05 22:01:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145435619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129500081] [2021-06-05 22:01:57,518 INFO 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 22:01:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:57,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129500081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:57,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:57,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:57,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105750337] [2021-06-05 22:01:57,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:57,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:57,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:57,694 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 22:01:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:57,935 INFO L93 Difference]: Finished difference Result 533 states and 1548 transitions. [2021-06-05 22:01:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:57,936 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 22:01:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:57,936 INFO L225 Difference]: With dead ends: 533 [2021-06-05 22:01:57,936 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 22:01:57,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 22:01:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 352. [2021-06-05 22:01:57,940 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 22:01:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1096 transitions. [2021-06-05 22:01:57,940 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1096 transitions. Word has length 20 [2021-06-05 22:01:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:57,940 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1096 transitions. [2021-06-05 22:01:57,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1096 transitions. [2021-06-05 22:01:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:57,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:57,941 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:58,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2033,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:58,141 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 962512025, now seen corresponding path program 206 times [2021-06-05 22:01:58,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:58,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448926742] [2021-06-05 22:01:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:58,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448926742] [2021-06-05 22:01:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448926742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957336470] [2021-06-05 22:01:58,217 INFO L93 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 22:01:58,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:58,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957336470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:58,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:58,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:58,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546433325] [2021-06-05 22:01:58,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:58,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:58,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:58,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:58,456 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 22:01:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:58,704 INFO L93 Difference]: Finished difference Result 496 states and 1466 transitions. [2021-06-05 22:01:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:58,704 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 22:01:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:58,705 INFO L225 Difference]: With dead ends: 496 [2021-06-05 22:01:58,705 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 22:01:58,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 22:01:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 349. [2021-06-05 22:01:58,710 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 22:01:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 22:01:58,710 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 22:01:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:58,711 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 22:01:58,711 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 22:01:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 22:01:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:58,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:58,711 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:58,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:58,921 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:58,921 INFO L82 PathProgramCache]: Analyzing trace with hash -309093847, now seen corresponding path program 207 times [2021-06-05 22:01:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507543362] [2021-06-05 22:01:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:58,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:58,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507543362] [2021-06-05 22:01:58,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507543362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:58,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71522316] [2021-06-05 22:01:58,981 INFO L93 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 22:01:59,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:59,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:59,180 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 22:01:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71522316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:59,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:59,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:59,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012008926] [2021-06-05 22:01:59,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:59,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:59,181 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 22:01:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:59,483 INFO L93 Difference]: Finished difference Result 521 states and 1500 transitions. [2021-06-05 22:01:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:59,483 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 22:01:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:59,484 INFO L225 Difference]: With dead ends: 521 [2021-06-05 22:01:59,484 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 22:01:59,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:01:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 22:01:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 353. [2021-06-05 22:01:59,488 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 22:01:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-06-05 22:01:59,488 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-06-05 22:01:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:59,488 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-06-05 22:01:59,488 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 22:01:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-06-05 22:01:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:59,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:59,489 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:59,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2052,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:59,689 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2070449523, now seen corresponding path program 208 times [2021-06-05 22:01:59,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:59,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914594902] [2021-06-05 22:01:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:59,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:59,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914594902] [2021-06-05 22:01:59,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914594902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:59,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605565700] [2021-06-05 22:01:59,751 INFO L93 rtionOrderModulation]: Changing 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 22:01:59,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:01:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:59,943 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 22:01:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605565700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:59,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:59,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:01:59,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391299879] [2021-06-05 22:01:59,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:01:59,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:01:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:01:59,944 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 22:02:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:00,219 INFO L93 Difference]: Finished difference Result 527 states and 1521 transitions. [2021-06-05 22:02:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:00,219 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 22:02:00,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:00,220 INFO L225 Difference]: With dead ends: 527 [2021-06-05 22:02:00,220 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 22:02:00,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:02:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 22:02:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 350. [2021-06-05 22:02:00,223 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 22:02:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1085 transitions. [2021-06-05 22:02:00,224 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1085 transitions. Word has length 20 [2021-06-05 22:02:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:00,224 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1085 transitions. [2021-06-05 22:02:00,224 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 22:02:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1085 transitions. [2021-06-05 22:02:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:00,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:00,224 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:00,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2062,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:00,425 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1852708291, now seen corresponding path program 209 times [2021-06-05 22:02:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:00,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063520524] [2021-06-05 22:02:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:00,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:00,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063520524] [2021-06-05 22:02:00,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063520524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:00,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757491751] [2021-06-05 22:02:00,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:00,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:00,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757491751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:02:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332955955] [2021-06-05 22:02:00,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:02:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:02:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:00,666 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 22:02:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:00,892 INFO L93 Difference]: Finished difference Result 457 states and 1366 transitions. [2021-06-05 22:02:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:00,893 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 22:02:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:00,893 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:02:00,893 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:02:00,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:02:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 351. [2021-06-05 22:02:00,896 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 22:02:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1087 transitions. [2021-06-05 22:02:00,897 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1087 transitions. Word has length 20 [2021-06-05 22:02:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:00,897 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1087 transitions. [2021-06-05 22:02:00,897 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 22:02:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1087 transitions. [2021-06-05 22:02:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:00,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:00,898 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:01,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:01,098 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1149916605, now seen corresponding path program 210 times [2021-06-05 22:02:01,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:01,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716383407] [2021-06-05 22:02:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:01,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716383407] [2021-06-05 22:02:01,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716383407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4959642] [2021-06-05 22:02:01,162 INFO L93 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 22:02:01,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:01,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:01,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4959642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:01,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:01,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:02:01,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119718429] [2021-06-05 22:02:01,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:02:01,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:01,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:02:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:01,356 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 22:02:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:01,618 INFO L93 Difference]: Finished difference Result 445 states and 1333 transitions. [2021-06-05 22:02:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:01,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:01,619 INFO L225 Difference]: With dead ends: 445 [2021-06-05 22:02:01,619 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 22:02:01,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 22:02:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 340. [2021-06-05 22:02:01,623 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 22:02:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 22:02:01,623 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 22:02:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:01,623 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 22:02:01,623 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 22:02:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 22:02:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:01,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:01,624 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:01,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2079,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:01,824 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:01,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1249185655, now seen corresponding path program 211 times [2021-06-05 22:02:01,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:01,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863326322] [2021-06-05 22:02:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:01,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:01,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863326322] [2021-06-05 22:02:01,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863326322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:01,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710629721] [2021-06-05 22:02:01,887 INFO 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 22:02:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:01,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:02,051 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 22:02:02,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710629721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:02,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:02,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857073715] [2021-06-05 22:02:02,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:02,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:02,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:02,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:02,052 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 22:02:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:02,340 INFO L93 Difference]: Finished difference Result 400 states and 1211 transitions. [2021-06-05 22:02:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:02,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:02,341 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:02:02,341 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:02:02,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:02:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 337. [2021-06-05 22:02:02,344 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 22:02:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1038 transitions. [2021-06-05 22:02:02,344 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1038 transitions. Word has length 20 [2021-06-05 22:02:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:02,344 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1038 transitions. [2021-06-05 22:02:02,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1038 transitions. [2021-06-05 22:02:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:02,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:02,345 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:02,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:02,545 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash 605987641, now seen corresponding path program 212 times [2021-06-05 22:02:02,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:02,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871497993] [2021-06-05 22:02:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:02,617 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 22:02:02,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:02,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871497993] [2021-06-05 22:02:02,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871497993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268600077] [2021-06-05 22:02:02,617 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 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 22:02:02,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:02,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:02,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:02,808 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 22:02:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268600077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:02,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:02:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217514710] [2021-06-05 22:02:02,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:02:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:02:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:02,808 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 22:02:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:03,046 INFO L93 Difference]: Finished difference Result 445 states and 1305 transitions. [2021-06-05 22:02:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:03,047 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 22:02:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:03,047 INFO L225 Difference]: With dead ends: 445 [2021-06-05 22:02:03,047 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 22:02:03,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 22:02:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 351. [2021-06-05 22:02:03,050 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 22:02:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1077 transitions. [2021-06-05 22:02:03,051 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1077 transitions. Word has length 20 [2021-06-05 22:02:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:03,051 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1077 transitions. [2021-06-05 22:02:03,051 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 22:02:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1077 transitions. [2021-06-05 22:02:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:03,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:03,051 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:03,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:03,252 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1309436285, now seen corresponding path program 213 times [2021-06-05 22:02:03,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:03,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481792742] [2021-06-05 22:02:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:03,312 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 22:02:03,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:03,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481792742] [2021-06-05 22:02:03,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481792742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:03,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377739956] [2021-06-05 22:02:03,313 INFO L93 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 22:02:03,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:03,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:03,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:03,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377739956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:03,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:03,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:02:03,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476754197] [2021-06-05 22:02:03,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:02:03,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:03,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:02:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:03,514 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 22:02:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:03,769 INFO L93 Difference]: Finished difference Result 451 states and 1326 transitions. [2021-06-05 22:02:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:03,769 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 22:02:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:03,770 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:02:03,770 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:02:03,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:02:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 349. [2021-06-05 22:02:03,773 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 22:02:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-06-05 22:02:03,774 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-06-05 22:02:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:03,774 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-06-05 22:02:03,774 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 22:02:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-06-05 22:02:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:03,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:03,774 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:03,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2101 [2021-06-05 22:02:03,975 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash -269200487, now seen corresponding path program 214 times [2021-06-05 22:02:03,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:03,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61848728] [2021-06-05 22:02:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:04,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:04,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61848728] [2021-06-05 22:02:04,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61848728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:04,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902507872] [2021-06-05 22:02:04,035 INFO L93 rtionOrderModulation]: Changing 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 22:02:04,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:04,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:04,223 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 22:02:04,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902507872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:04,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:04,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:04,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454791104] [2021-06-05 22:02:04,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:04,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:04,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:04,224 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 22:02:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:04,524 INFO L93 Difference]: Finished difference Result 420 states and 1261 transitions. [2021-06-05 22:02:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:04,524 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 22:02:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:04,525 INFO L225 Difference]: With dead ends: 420 [2021-06-05 22:02:04,525 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 22:02:04,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 22:02:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 336. [2021-06-05 22:02:04,528 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 22:02:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-06-05 22:02:04,528 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-06-05 22:02:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:04,528 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-06-05 22:02:04,528 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 22:02:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-06-05 22:02:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:04,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:04,529 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:04,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-06-05 22:02:04,729 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1330548979, now seen corresponding path program 215 times [2021-06-05 22:02:04,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:04,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496820042] [2021-06-05 22:02:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:04,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:04,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496820042] [2021-06-05 22:02:04,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496820042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:04,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745547459] [2021-06-05 22:02:04,780 INFO L93 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 22:02:04,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:04,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:04,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:04,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745547459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:04,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:04,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:04,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125531194] [2021-06-05 22:02:04,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:04,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:04,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:04,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:04,948 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 22:02:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:05,127 INFO L93 Difference]: Finished difference Result 394 states and 1182 transitions. [2021-06-05 22:02:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:05,127 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 22:02:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:05,128 INFO L225 Difference]: With dead ends: 394 [2021-06-05 22:02:05,128 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 22:02:05,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 22:02:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 340. [2021-06-05 22:02:05,132 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 22:02:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1044 transitions. [2021-06-05 22:02:05,132 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1044 transitions. Word has length 20 [2021-06-05 22:02:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:05,133 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1044 transitions. [2021-06-05 22:02:05,133 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 22:02:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1044 transitions. [2021-06-05 22:02:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:05,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:05,133 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:05,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2120,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:05,353 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:05,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2081949417, now seen corresponding path program 216 times [2021-06-05 22:02:05,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:05,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689353513] [2021-06-05 22:02:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:05,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689353513] [2021-06-05 22:02:05,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689353513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042044800] [2021-06-05 22:02:05,406 INFO L93 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 22:02:05,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:05,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:05,579 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 22:02:05,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042044800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:05,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:05,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132103712] [2021-06-05 22:02:05,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:05,580 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 22:02:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:05,779 INFO L93 Difference]: Finished difference Result 419 states and 1234 transitions. [2021-06-05 22:02:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:05,780 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 22:02:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:05,780 INFO L225 Difference]: With dead ends: 419 [2021-06-05 22:02:05,780 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 22:02:05,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 22:02:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 350. [2021-06-05 22:02:05,783 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 22:02:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1071 transitions. [2021-06-05 22:02:05,784 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1071 transitions. Word has length 20 [2021-06-05 22:02:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:05,784 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1071 transitions. [2021-06-05 22:02:05,784 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 22:02:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1071 transitions. [2021-06-05 22:02:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:05,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:05,785 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:05,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2125 [2021-06-05 22:02:05,985 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash 166525491, now seen corresponding path program 217 times [2021-06-05 22:02:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307381567] [2021-06-05 22:02:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:06,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307381567] [2021-06-05 22:02:06,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307381567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919848409] [2021-06-05 22:02:06,039 INFO 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 22:02:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:06,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:06,218 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 22:02:06,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919848409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:06,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:06,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629134568] [2021-06-05 22:02:06,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:06,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:06,219 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 22:02:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:06,366 INFO L93 Difference]: Finished difference Result 390 states and 1180 transitions. [2021-06-05 22:02:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:06,367 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 22:02:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:06,367 INFO L225 Difference]: With dead ends: 390 [2021-06-05 22:02:06,367 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 22:02:06,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 22:02:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2021-06-05 22:02:06,370 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 22:02:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1039 transitions. [2021-06-05 22:02:06,371 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1039 transitions. Word has length 20 [2021-06-05 22:02:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:06,371 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1039 transitions. [2021-06-05 22:02:06,371 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 22:02:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1039 transitions. [2021-06-05 22:02:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:06,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:06,371 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:06,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:06,594 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:06,594 INFO L82 PathProgramCache]: Analyzing trace with hash -30479213, now seen corresponding path program 218 times [2021-06-05 22:02:06,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:06,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907740163] [2021-06-05 22:02:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:06,651 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 22:02:06,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:06,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907740163] [2021-06-05 22:02:06,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907740163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093546497] [2021-06-05 22:02:06,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:06,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:06,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:06,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:06,807 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 22:02:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093546497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:06,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:06,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137430283] [2021-06-05 22:02:06,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:06,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:06,808 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 22:02:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:07,021 INFO L93 Difference]: Finished difference Result 425 states and 1249 transitions. [2021-06-05 22:02:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:07,021 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 22:02:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:07,022 INFO L225 Difference]: With dead ends: 425 [2021-06-05 22:02:07,022 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 22:02:07,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 22:02:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 352. [2021-06-05 22:02:07,026 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 22:02:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1078 transitions. [2021-06-05 22:02:07,026 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1078 transitions. Word has length 20 [2021-06-05 22:02:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:07,027 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1078 transitions. [2021-06-05 22:02:07,027 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 22:02:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1078 transitions. [2021-06-05 22:02:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:07,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:07,027 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:07,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2135,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:07,233 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1945903139, now seen corresponding path program 219 times [2021-06-05 22:02:07,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:07,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725908321] [2021-06-05 22:02:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:07,292 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 22:02:07,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:07,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725908321] [2021-06-05 22:02:07,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725908321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:07,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295199172] [2021-06-05 22:02:07,292 INFO L93 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 22:02:07,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:07,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:07,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295199172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:07,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:07,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:07,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923009503] [2021-06-05 22:02:07,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:07,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:07,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:07,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:07,449 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 22:02:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:07,662 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2021-06-05 22:02:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:07,662 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 22:02:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:07,663 INFO L225 Difference]: With dead ends: 425 [2021-06-05 22:02:07,663 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 22:02:07,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 22:02:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 350. [2021-06-05 22:02:07,666 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 22:02:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1073 transitions. [2021-06-05 22:02:07,667 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1073 transitions. Word has length 20 [2021-06-05 22:02:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:07,667 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1073 transitions. [2021-06-05 22:02:07,667 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 22:02:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1073 transitions. [2021-06-05 22:02:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:07,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:07,667 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:07,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:07,868 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash -905667341, now seen corresponding path program 220 times [2021-06-05 22:02:07,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:07,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384074937] [2021-06-05 22:02:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:07,921 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 22:02:07,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:07,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384074937] [2021-06-05 22:02:07,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384074937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:07,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068085616] [2021-06-05 22:02:07,922 INFO L93 rtionOrderModulation]: Changing 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 22:02:07,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:07,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:08,063 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 22:02:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068085616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:08,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:08,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265855721] [2021-06-05 22:02:08,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:08,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:08,064 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 22:02:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:08,283 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-06-05 22:02:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:08,283 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 22:02:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:08,284 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:02:08,284 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:02:08,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:02:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 335. [2021-06-05 22:02:08,287 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 22:02:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-06-05 22:02:08,287 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-06-05 22:02:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:08,287 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-06-05 22:02:08,287 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 22:02:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-06-05 22:02:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:08,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:08,288 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:08,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2146,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:08,488 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1430277309, now seen corresponding path program 221 times [2021-06-05 22:02:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:08,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958472377] [2021-06-05 22:02:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:08,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:08,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958472377] [2021-06-05 22:02:08,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958472377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:08,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263235179] [2021-06-05 22:02:08,534 INFO L93 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 22:02:08,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:08,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:08,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:08,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:08,676 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 22:02:08,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263235179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:08,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:08,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:08,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074282737] [2021-06-05 22:02:08,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:08,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:08,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:08,677 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 22:02:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:08,862 INFO L93 Difference]: Finished difference Result 458 states and 1340 transitions. [2021-06-05 22:02:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:08,863 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 22:02:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:08,863 INFO L225 Difference]: With dead ends: 458 [2021-06-05 22:02:08,863 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 22:02:08,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 22:02:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2021-06-05 22:02:08,867 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 22:02:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-06-05 22:02:08,868 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-06-05 22:02:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:08,868 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-06-05 22:02:08,868 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 22:02:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-06-05 22:02:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:08,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:08,868 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-06-05 22:02:09,089 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -852333885, now seen corresponding path program 222 times [2021-06-05 22:02:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:09,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894016532] [2021-06-05 22:02:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:09,141 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 22:02:09,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:09,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894016532] [2021-06-05 22:02:09,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894016532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:09,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886215906] [2021-06-05 22:02:09,141 INFO L93 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 22:02:09,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:09,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:09,309 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 22:02:09,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886215906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:09,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:09,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:09,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705477891] [2021-06-05 22:02:09,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:09,310 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 22:02:09,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:09,462 INFO L93 Difference]: Finished difference Result 454 states and 1332 transitions. [2021-06-05 22:02:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:09,462 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 22:02:09,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:09,463 INFO L225 Difference]: With dead ends: 454 [2021-06-05 22:02:09,463 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 22:02:09,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 22:02:09,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 341. [2021-06-05 22:02:09,466 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 22:02:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-06-05 22:02:09,467 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-06-05 22:02:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:09,467 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-06-05 22:02:09,467 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 22:02:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-06-05 22:02:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:09,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:09,467 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:09,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:09,668 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:09,668 INFO L82 PathProgramCache]: Analyzing trace with hash -100933447, now seen corresponding path program 223 times [2021-06-05 22:02:09,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:09,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139958197] [2021-06-05 22:02:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:09,718 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 22:02:09,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:09,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139958197] [2021-06-05 22:02:09,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139958197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:09,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059305635] [2021-06-05 22:02:09,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:09,886 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 22:02:09,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059305635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:09,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:09,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:09,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548947482] [2021-06-05 22:02:09,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:09,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:09,887 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 22:02:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:10,159 INFO L93 Difference]: Finished difference Result 479 states and 1384 transitions. [2021-06-05 22:02:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:10,159 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 22:02:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:10,160 INFO L225 Difference]: With dead ends: 479 [2021-06-05 22:02:10,160 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 22:02:10,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 22:02:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 351. [2021-06-05 22:02:10,164 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 22:02:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-06-05 22:02:10,164 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-06-05 22:02:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:10,164 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-06-05 22:02:10,164 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 22:02:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-06-05 22:02:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:10,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:10,165 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:10,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-06-05 22:02:10,365 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2016357373, now seen corresponding path program 224 times [2021-06-05 22:02:10,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:10,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155615719] [2021-06-05 22:02:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:10,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:10,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155615719] [2021-06-05 22:02:10,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155615719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:10,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528382594] [2021-06-05 22:02:10,431 INFO L93 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 22:02:10,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:10,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:10,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:10,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:10,600 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 22:02:10,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528382594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:10,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:10,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:10,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081672433] [2021-06-05 22:02:10,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:10,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:10,601 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 22:02:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:10,761 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-06-05 22:02:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:10,761 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 22:02:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:10,761 INFO L225 Difference]: With dead ends: 450 [2021-06-05 22:02:10,762 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 22:02:10,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 22:02:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 337. [2021-06-05 22:02:10,765 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 22:02:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 22:02:10,765 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 22:02:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:10,765 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 22:02:10,765 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 22:02:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 22:02:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:10,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:10,766 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:10,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2164,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:10,966 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:10,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1488800739, now seen corresponding path program 225 times [2021-06-05 22:02:10,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:10,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867716874] [2021-06-05 22:02:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:11,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:11,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867716874] [2021-06-05 22:02:11,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867716874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:11,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925111796] [2021-06-05 22:02:11,012 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 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 22:02:11,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:11,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:11,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:11,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925111796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:11,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:11,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:11,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512337146] [2021-06-05 22:02:11,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:11,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:11,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:11,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:11,165 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 22:02:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:11,319 INFO L93 Difference]: Finished difference Result 391 states and 1173 transitions. [2021-06-05 22:02:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:11,319 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 22:02:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:11,320 INFO L225 Difference]: With dead ends: 391 [2021-06-05 22:02:11,320 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 22:02:11,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 22:02:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 341. [2021-06-05 22:02:11,323 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 22:02:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-06-05 22:02:11,323 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-06-05 22:02:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:11,323 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-06-05 22:02:11,323 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 22:02:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-06-05 22:02:11,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:11,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:11,324 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:11,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2168,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:11,524 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:11,525 INFO L82 PathProgramCache]: Analyzing trace with hash -737400301, now seen corresponding path program 226 times [2021-06-05 22:02:11,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:11,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537364906] [2021-06-05 22:02:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:11,571 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 22:02:11,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:11,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537364906] [2021-06-05 22:02:11,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537364906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:11,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000035993] [2021-06-05 22:02:11,572 INFO L93 rtionOrderModulation]: Changing 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 22:02:11,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:11,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:11,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:11,718 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 22:02:11,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000035993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:11,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:11,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:11,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750279158] [2021-06-05 22:02:11,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:11,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:11,719 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 22:02:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:11,905 INFO L93 Difference]: Finished difference Result 416 states and 1225 transitions. [2021-06-05 22:02:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:11,905 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 22:02:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:11,906 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:02:11,906 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 22:02:11,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 22:02:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 351. [2021-06-05 22:02:11,909 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 22:02:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-06-05 22:02:11,910 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-06-05 22:02:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:11,910 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-06-05 22:02:11,910 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 22:02:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-06-05 22:02:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:11,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:11,910 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:12,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:12,111 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:12,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1642143069, now seen corresponding path program 227 times [2021-06-05 22:02:12,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:12,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820014479] [2021-06-05 22:02:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:12,160 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 22:02:12,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:12,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820014479] [2021-06-05 22:02:12,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820014479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422378384] [2021-06-05 22:02:12,160 INFO L93 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 22:02:12,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:12,308 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 22:02:12,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422378384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:12,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:12,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270594385] [2021-06-05 22:02:12,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:12,309 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 22:02:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:12,439 INFO L93 Difference]: Finished difference Result 387 states and 1171 transitions. [2021-06-05 22:02:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:12,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:12,440 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:02:12,440 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 22:02:12,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 22:02:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 339. [2021-06-05 22:02:12,443 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 22:02:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-06-05 22:02:12,444 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-06-05 22:02:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:12,444 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-06-05 22:02:12,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-06-05 22:02:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:12,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:12,444 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:12,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2180 [2021-06-05 22:02:12,645 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1445138365, now seen corresponding path program 228 times [2021-06-05 22:02:12,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:12,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266274583] [2021-06-05 22:02:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:12,693 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 22:02:12,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:12,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266274583] [2021-06-05 22:02:12,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266274583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470099398] [2021-06-05 22:02:12,693 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 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 22:02:12,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:12,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:12,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:12,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470099398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:12,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:12,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372281900] [2021-06-05 22:02:12,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:12,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:12,834 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 22:02:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:13,054 INFO L93 Difference]: Finished difference Result 420 states and 1235 transitions. [2021-06-05 22:02:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:13,054 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 22:02:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:13,055 INFO L225 Difference]: With dead ends: 420 [2021-06-05 22:02:13,055 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:02:13,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:02:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 353. [2021-06-05 22:02:13,059 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 22:02:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1079 transitions. [2021-06-05 22:02:13,060 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1079 transitions. Word has length 20 [2021-06-05 22:02:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:13,060 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1079 transitions. [2021-06-05 22:02:13,060 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 22:02:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1079 transitions. [2021-06-05 22:02:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:13,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:13,061 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:13,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-06-05 22:02:13,277 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash -470285561, now seen corresponding path program 229 times [2021-06-05 22:02:13,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:13,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097669055] [2021-06-05 22:02:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:13,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:13,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097669055] [2021-06-05 22:02:13,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097669055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:13,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133475030] [2021-06-05 22:02:13,326 INFO 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 22:02:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:13,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133475030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:13,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:13,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075025865] [2021-06-05 22:02:13,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:13,463 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 22:02:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:13,651 INFO L93 Difference]: Finished difference Result 420 states and 1241 transitions. [2021-06-05 22:02:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:13,652 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 22:02:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:13,652 INFO L225 Difference]: With dead ends: 420 [2021-06-05 22:02:13,652 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 22:02:13,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 22:02:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 351. [2021-06-05 22:02:13,656 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 22:02:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1074 transitions. [2021-06-05 22:02:13,656 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1074 transitions. Word has length 20 [2021-06-05 22:02:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:13,656 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1074 transitions. [2021-06-05 22:02:13,656 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 22:02:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1074 transitions. [2021-06-05 22:02:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:13,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:13,657 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:13,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:13,857 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:13,858 INFO L82 PathProgramCache]: Analyzing trace with hash 569950237, now seen corresponding path program 230 times [2021-06-05 22:02:13,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:13,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138746485] [2021-06-05 22:02:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:13,906 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 22:02:13,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138746485] [2021-06-05 22:02:13,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138746485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865178647] [2021-06-05 22:02:13,906 INFO L93 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 22:02:13,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:14,029 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 22:02:14,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865178647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:14,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:14,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:02:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893399594] [2021-06-05 22:02:14,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:02:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:14,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:02:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:02:14,030 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 22:02:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:14,202 INFO L93 Difference]: Finished difference Result 395 states and 1191 transitions. [2021-06-05 22:02:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:14,203 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 22:02:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:14,203 INFO L225 Difference]: With dead ends: 395 [2021-06-05 22:02:14,203 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 22:02:14,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 22:02:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 337. [2021-06-05 22:02:14,206 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 22:02:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 22:02:14,207 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 22:02:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:14,207 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 22:02:14,207 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 22:02:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 22:02:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:14,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:14,208 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:14,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2198,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:14,408 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:14,408 INFO L82 PathProgramCache]: Analyzing trace with hash 915807584, now seen corresponding path program 231 times [2021-06-05 22:02:14,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:14,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99736590] [2021-06-05 22:02:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:14,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:14,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99736590] [2021-06-05 22:02:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99736590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:14,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701778054] [2021-06-05 22:02:14,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:14,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:14,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:14,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:14,561 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 22:02:14,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:14,564 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 13 treesize of output 9 [2021-06-05 22:02:14,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:14,581 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:02:14,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:14,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:02:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701778054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:14,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:14,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:02:14,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508423885] [2021-06-05 22:02:14,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:14,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:14,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:14,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:14,623 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 22:02:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:14,798 INFO L93 Difference]: Finished difference Result 436 states and 1297 transitions. [2021-06-05 22:02:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:14,799 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 22:02:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:14,799 INFO L225 Difference]: With dead ends: 436 [2021-06-05 22:02:14,799 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 22:02:14,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 22:02:14,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 332. [2021-06-05 22:02:14,802 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 22:02:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-06-05 22:02:14,803 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-06-05 22:02:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:14,803 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-06-05 22:02:14,803 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 22:02:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-06-05 22:02:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:14,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:14,803 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:15,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-06-05 22:02:15,004 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1508226211, now seen corresponding path program 232 times [2021-06-05 22:02:15,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:15,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569741650] [2021-06-05 22:02:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:15,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:15,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569741650] [2021-06-05 22:02:15,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569741650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:15,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324748815] [2021-06-05 22:02:15,060 INFO L93 rtionOrderModulation]: Changing 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 22:02:15,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:15,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:15,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:15,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,200 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 22:02:15,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,207 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 22:02:15,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:15,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 22:02:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:15,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324748815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:15,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:15,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:15,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933442939] [2021-06-05 22:02:15,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:15,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:15,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:15,219 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 22:02:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:15,355 INFO L93 Difference]: Finished difference Result 419 states and 1237 transitions. [2021-06-05 22:02:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:15,356 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 22:02:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:15,356 INFO L225 Difference]: With dead ends: 419 [2021-06-05 22:02:15,356 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 22:02:15,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 22:02:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 342. [2021-06-05 22:02:15,359 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 22:02:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1041 transitions. [2021-06-05 22:02:15,360 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1041 transitions. Word has length 20 [2021-06-05 22:02:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:15,360 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1041 transitions. [2021-06-05 22:02:15,360 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 22:02:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1041 transitions. [2021-06-05 22:02:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:15,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:15,360 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:15,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-06-05 22:02:15,561 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1628097555, now seen corresponding path program 233 times [2021-06-05 22:02:15,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:15,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56911194] [2021-06-05 22:02:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:15,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:15,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56911194] [2021-06-05 22:02:15,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56911194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:15,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701815337] [2021-06-05 22:02:15,613 INFO L93 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 22:02:15,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:15,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:15,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:15,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:15,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,738 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 22:02:15,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:15,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 22:02:15,760 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 22:02:15,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701815337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:15,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:15,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:02:15,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003274315] [2021-06-05 22:02:15,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:02:15,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:02:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:02:15,761 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 22:02:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:15,888 INFO L93 Difference]: Finished difference Result 471 states and 1358 transitions. [2021-06-05 22:02:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:15,888 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 22:02:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:15,889 INFO L225 Difference]: With dead ends: 471 [2021-06-05 22:02:15,889 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 22:02:15,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 22:02:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 345. [2021-06-05 22:02:15,892 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 22:02:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1052 transitions. [2021-06-05 22:02:15,892 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1052 transitions. Word has length 20 [2021-06-05 22:02:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:15,892 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1052 transitions. [2021-06-05 22:02:15,893 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 22:02:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1052 transitions. [2021-06-05 22:02:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:15,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:15,893 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2211 [2021-06-05 22:02:16,093 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1172962019, now seen corresponding path program 234 times [2021-06-05 22:02:16,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675504407] [2021-06-05 22:02:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675504407] [2021-06-05 22:02:16,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675504407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328608129] [2021-06-05 22:02:16,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:16,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:16,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:16,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:16,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,269 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 22:02:16,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:16,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 22:02:16,289 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 22:02:16,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328608129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:16,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:02:16,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123641855] [2021-06-05 22:02:16,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:02:16,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:02:16,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:02:16,290 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 22:02:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,412 INFO L93 Difference]: Finished difference Result 428 states and 1255 transitions. [2021-06-05 22:02:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:16,413 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 22:02:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,413 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:02:16,413 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 22:02:16,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 22:02:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 337. [2021-06-05 22:02:16,416 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 22:02:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1028 transitions. [2021-06-05 22:02:16,417 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1028 transitions. Word has length 20 [2021-06-05 22:02:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,417 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1028 transitions. [2021-06-05 22:02:16,417 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 22:02:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1028 transitions. [2021-06-05 22:02:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:16,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,418 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:16,633 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -534005967, now seen corresponding path program 235 times [2021-06-05 22:02:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153476989] [2021-06-05 22:02:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153476989] [2021-06-05 22:02:16,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153476989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478690029] [2021-06-05 22:02:16,688 INFO 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 22:02:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:16,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:16,842 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 22:02:16,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478690029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:16,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:16,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280767210] [2021-06-05 22:02:16,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:16,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:16,843 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 22:02:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,985 INFO L93 Difference]: Finished difference Result 397 states and 1171 transitions. [2021-06-05 22:02:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:16,985 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 22:02:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,986 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:02:16,986 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:02:16,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:02:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 343. [2021-06-05 22:02:16,989 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 22:02:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1050 transitions. [2021-06-05 22:02:16,989 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1050 transitions. Word has length 20 [2021-06-05 22:02:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,990 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1050 transitions. [2021-06-05 22:02:16,990 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 22:02:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1050 transitions. [2021-06-05 22:02:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:16,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,990 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:17,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2229,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:17,191 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2027913689, now seen corresponding path program 236 times [2021-06-05 22:02:17,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:17,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573337265] [2021-06-05 22:02:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:17,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573337265] [2021-06-05 22:02:17,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573337265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265812919] [2021-06-05 22:02:17,246 INFO L93 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 22:02:17,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:17,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:17,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:17,402 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 22:02:17,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265812919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:17,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:17,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387546977] [2021-06-05 22:02:17,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:17,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:17,403 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 22:02:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:17,618 INFO L93 Difference]: Finished difference Result 403 states and 1178 transitions. [2021-06-05 22:02:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:17,619 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 22:02:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:17,619 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:02:17,619 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:02:17,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:02:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-06-05 22:02:17,622 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 22:02:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1039 transitions. [2021-06-05 22:02:17,623 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1039 transitions. Word has length 20 [2021-06-05 22:02:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:17,623 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1039 transitions. [2021-06-05 22:02:17,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1039 transitions. [2021-06-05 22:02:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:17,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:17,623 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:17,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2237 [2021-06-05 22:02:17,824 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1490058111, now seen corresponding path program 237 times [2021-06-05 22:02:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:17,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081421684] [2021-06-05 22:02:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,879 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 22:02:17,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081421684] [2021-06-05 22:02:17,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081421684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672351727] [2021-06-05 22:02:17,880 INFO L93 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 22:02:17,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:17,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:17,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:18,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672351727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:18,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:02:18,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352455709] [2021-06-05 22:02:18,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:02:18,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:18,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:02:18,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:02:18,034 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 22:02:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:18,231 INFO L93 Difference]: Finished difference Result 361 states and 1083 transitions. [2021-06-05 22:02:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:18,231 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 22:02:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:18,231 INFO L225 Difference]: With dead ends: 361 [2021-06-05 22:02:18,231 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 22:02:18,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 22:02:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 332. [2021-06-05 22:02:18,234 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 22:02:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-06-05 22:02:18,235 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-06-05 22:02:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:18,235 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-06-05 22:02:18,235 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 22:02:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-06-05 22:02:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:18,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:18,235 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:18,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-06-05 22:02:18,436 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash -144970506, now seen corresponding path program 238 times [2021-06-05 22:02:18,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:18,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762681093] [2021-06-05 22:02:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:18,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:18,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762681093] [2021-06-05 22:02:18,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762681093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104765493] [2021-06-05 22:02:18,480 INFO L93 rtionOrderModulation]: Changing 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 22:02:18,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:18,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:18,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:18,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:18,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:18,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,598 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 6 treesize of output 4 [2021-06-05 22:02:18,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:18,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:18,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,626 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:02:18,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:18,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 22:02:18,684 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 22:02:18,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104765493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:18,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:02:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704440770] [2021-06-05 22:02:18,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:18,684 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 22:02:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:18,918 INFO L93 Difference]: Finished difference Result 522 states and 1535 transitions. [2021-06-05 22:02:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:18,919 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 22:02:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:18,919 INFO L225 Difference]: With dead ends: 522 [2021-06-05 22:02:18,919 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 22:02:18,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 22:02:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 337. [2021-06-05 22:02:18,922 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 22:02:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 22:02:18,923 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 22:02:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:18,923 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 22:02:18,923 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 22:02:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 22:02:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:18,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:18,923 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2254 [2021-06-05 22:02:19,124 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2049541401, now seen corresponding path program 239 times [2021-06-05 22:02:19,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181360049] [2021-06-05 22:02:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,177 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 22:02:19,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181360049] [2021-06-05 22:02:19,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181360049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:19,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871231769] [2021-06-05 22:02:19,177 INFO L93 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 22:02:19,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:19,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:19,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:19,301 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 13 treesize of output 9 [2021-06-05 22:02:19,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,304 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 12 treesize of output 8 [2021-06-05 22:02:19,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,346 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-06-05 22:02:19,347 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-06-05 22:02:19,350 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 22:02:19,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,382 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 22:02:19,382 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:02:19,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:19,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-06-05 22:02:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:19,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871231769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:19,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:19,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:19,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530628076] [2021-06-05 22:02:19,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:19,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:19,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:19,431 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 22:02:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,616 INFO L93 Difference]: Finished difference Result 577 states and 1670 transitions. [2021-06-05 22:02:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:19,617 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 22:02:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,617 INFO L225 Difference]: With dead ends: 577 [2021-06-05 22:02:19,618 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 22:02:19,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 22:02:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 349. [2021-06-05 22:02:19,623 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 22:02:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 22:02:19,623 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 22:02:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,624 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 22:02:19,624 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 22:02:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 22:02:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:19,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,624 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-06-05 22:02:19,847 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1086782365, now seen corresponding path program 240 times [2021-06-05 22:02:19,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063118390] [2021-06-05 22:02:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:19,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063118390] [2021-06-05 22:02:19,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063118390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:19,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365838161] [2021-06-05 22:02:19,898 INFO L93 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 22:02:19,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:19,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:19,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:19,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:20,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:20,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,067 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-06-05 22:02:20,069 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 6 treesize of output 4 [2021-06-05 22:02:20,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:20,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,093 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:20,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:20,094 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 22:02:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:20,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365838161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:20,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:20,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:20,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384849753] [2021-06-05 22:02:20,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:20,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:20,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:20,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:20,136 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 22:02:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:20,298 INFO L93 Difference]: Finished difference Result 629 states and 1791 transitions. [2021-06-05 22:02:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:20,299 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 22:02:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:20,299 INFO L225 Difference]: With dead ends: 629 [2021-06-05 22:02:20,299 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 22:02:20,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 22:02:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 355. [2021-06-05 22:02:20,303 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 22:02:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1106 transitions. [2021-06-05 22:02:20,304 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1106 transitions. Word has length 20 [2021-06-05 22:02:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:20,304 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1106 transitions. [2021-06-05 22:02:20,304 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 22:02:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1106 transitions. [2021-06-05 22:02:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:20,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:20,304 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:20,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2274,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:20,505 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1714277209, now seen corresponding path program 241 times [2021-06-05 22:02:20,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:20,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662745614] [2021-06-05 22:02:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:20,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662745614] [2021-06-05 22:02:20,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662745614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575582881] [2021-06-05 22:02:20,555 INFO 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 22:02:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:20,679 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 12 treesize of output 8 [2021-06-05 22:02:20,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:02:20,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:20,703 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 6 treesize of output 4 [2021-06-05 22:02:20,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,705 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 13 treesize of output 9 [2021-06-05 22:02:20,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,727 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:20,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:20,728 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:20,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575582881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:20,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:20,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:20,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172256322] [2021-06-05 22:02:20,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:20,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:20,770 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 22:02:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:20,955 INFO L93 Difference]: Finished difference Result 586 states and 1682 transitions. [2021-06-05 22:02:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:20,956 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 22:02:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:20,956 INFO L225 Difference]: With dead ends: 586 [2021-06-05 22:02:20,956 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 22:02:20,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 22:02:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 353. [2021-06-05 22:02:20,960 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 22:02:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-06-05 22:02:20,960 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-06-05 22:02:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:20,960 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-06-05 22:02:20,960 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 22:02:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-06-05 22:02:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:20,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:20,961 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:21,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:21,181 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1834913410, now seen corresponding path program 242 times [2021-06-05 22:02:21,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:21,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921384480] [2021-06-05 22:02:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:21,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921384480] [2021-06-05 22:02:21,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921384480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262775895] [2021-06-05 22:02:21,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:21,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:21,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:21,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:21,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:21,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,360 INFO L628 ElimStorePlain]: treesize reduction 13, result has 67.5 percent of original size [2021-06-05 22:02:21,362 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 12 treesize of output 8 [2021-06-05 22:02:21,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:21,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:21,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 22:02:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:21,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262775895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:21,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:21,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:02:21,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286015639] [2021-06-05 22:02:21,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:21,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:21,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:21,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:21,426 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 22:02:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:21,650 INFO L93 Difference]: Finished difference Result 469 states and 1402 transitions. [2021-06-05 22:02:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:21,650 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 22:02:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:21,651 INFO L225 Difference]: With dead ends: 469 [2021-06-05 22:02:21,651 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 22:02:21,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 22:02:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 347. [2021-06-05 22:02:21,654 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 22:02:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1066 transitions. [2021-06-05 22:02:21,655 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1066 transitions. Word has length 20 [2021-06-05 22:02:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:21,655 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1066 transitions. [2021-06-05 22:02:21,655 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 22:02:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1066 transitions. [2021-06-05 22:02:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:21,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:21,656 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:21,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-06-05 22:02:21,873 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:21,874 INFO L82 PathProgramCache]: Analyzing trace with hash -426848797, now seen corresponding path program 243 times [2021-06-05 22:02:21,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:21,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107657484] [2021-06-05 22:02:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:21,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107657484] [2021-06-05 22:02:21,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107657484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572901487] [2021-06-05 22:02:21,927 INFO L93 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 22:02:21,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:21,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:21,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:22,055 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 22:02:22,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,094 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-06-05 22:02:22,096 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 6 treesize of output 4 [2021-06-05 22:02:22,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,099 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 22:02:22,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,123 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:22,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:22,123 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 22:02:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:22,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572901487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:22,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:22,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:02:22,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640370039] [2021-06-05 22:02:22,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:02:22,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:22,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:02:22,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:22,176 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 22:02:22,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:22,334 INFO L93 Difference]: Finished difference Result 530 states and 1548 transitions. [2021-06-05 22:02:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:22,334 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 22:02:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:22,335 INFO L225 Difference]: With dead ends: 530 [2021-06-05 22:02:22,335 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 22:02:22,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 22:02:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 337. [2021-06-05 22:02:22,338 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 22:02:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 22:02:22,338 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 22:02:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:22,339 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 22:02:22,339 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 22:02:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 22:02:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:22,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:22,339 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:22,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2311,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:22,539 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:22,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1206202595, now seen corresponding path program 244 times [2021-06-05 22:02:22,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:22,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456475432] [2021-06-05 22:02:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:22,593 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 22:02:22,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456475432] [2021-06-05 22:02:22,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456475432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:22,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107878811] [2021-06-05 22:02:22,594 INFO L93 rtionOrderModulation]: Changing 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 22:02:22,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:22,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:22,717 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 6 treesize of output 4 [2021-06-05 22:02:22,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,752 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 22:02:22,754 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 12 treesize of output 8 [2021-06-05 22:02:22,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:22,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,776 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:02:22,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:22,776 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 22:02:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107878811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299026641] [2021-06-05 22:02:22,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:22,824 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 22:02:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:22,970 INFO L93 Difference]: Finished difference Result 497 states and 1466 transitions. [2021-06-05 22:02:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:22,971 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 22:02:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:22,971 INFO L225 Difference]: With dead ends: 497 [2021-06-05 22:02:22,971 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 22:02:22,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 22:02:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 340. [2021-06-05 22:02:22,975 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 22:02:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 22:02:22,975 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 22:02:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:22,975 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 22:02:22,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 22:02:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:22,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:22,976 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:23,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-06-05 22:02:23,176 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash -750934361, now seen corresponding path program 245 times [2021-06-05 22:02:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:23,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182962582] [2021-06-05 22:02:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:23,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182962582] [2021-06-05 22:02:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182962582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718108572] [2021-06-05 22:02:23,236 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 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 22:02:23,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:23,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:23,360 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 5 treesize of output 3 [2021-06-05 22:02:23,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,363 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 22:02:23,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:23,384 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 22:02:23,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,387 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 22:02:23,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,408 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:23,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:23,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:23,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718108572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:23,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:23,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277327000] [2021-06-05 22:02:23,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:23,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:23,454 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 22:02:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:23,563 INFO L93 Difference]: Finished difference Result 464 states and 1389 transitions. [2021-06-05 22:02:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:23,563 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 22:02:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:23,564 INFO L225 Difference]: With dead ends: 464 [2021-06-05 22:02:23,564 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 22:02:23,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 22:02:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 331. [2021-06-05 22:02:23,567 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 22:02:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1011 transitions. [2021-06-05 22:02:23,568 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1011 transitions. Word has length 20 [2021-06-05 22:02:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:23,568 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1011 transitions. [2021-06-05 22:02:23,568 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 22:02:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1011 transitions. [2021-06-05 22:02:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:23,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:23,569 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:23,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2333 [2021-06-05 22:02:23,792 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 538015729, now seen corresponding path program 246 times [2021-06-05 22:02:23,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:23,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708864828] [2021-06-05 22:02:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:23,848 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 22:02:23,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:23,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708864828] [2021-06-05 22:02:23,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708864828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:23,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708709519] [2021-06-05 22:02:23,848 INFO L93 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 22:02:23,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:23,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:23,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:23,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:23,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:23,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:24,002 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 22:02:24,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,005 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 22:02:24,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,027 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:24,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:24,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:24,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708709519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:24,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:24,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:24,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343191344] [2021-06-05 22:02:24,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:24,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:24,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:24,103 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 22:02:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:24,317 INFO L93 Difference]: Finished difference Result 574 states and 1673 transitions. [2021-06-05 22:02:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:24,317 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 22:02:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:24,318 INFO L225 Difference]: With dead ends: 574 [2021-06-05 22:02:24,318 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 22:02:24,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 22:02:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 339. [2021-06-05 22:02:24,321 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 22:02:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1047 transitions. [2021-06-05 22:02:24,322 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1047 transitions. Word has length 20 [2021-06-05 22:02:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:24,322 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1047 transitions. [2021-06-05 22:02:24,322 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 22:02:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1047 transitions. [2021-06-05 22:02:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:24,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:24,323 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:24,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-06-05 22:02:24,523 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash -955891993, now seen corresponding path program 247 times [2021-06-05 22:02:24,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:24,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64088800] [2021-06-05 22:02:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:24,587 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 22:02:24,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64088800] [2021-06-05 22:02:24,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64088800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195515160] [2021-06-05 22:02:24,587 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 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 22:02:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:24,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:24,763 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 22:02:24,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,807 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 22:02:24,809 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 13 treesize of output 9 [2021-06-05 22:02:24,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,812 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 12 treesize of output 8 [2021-06-05 22:02:24,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,834 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:02:24,834 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:02:24,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:24,834 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 22:02:24,908 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 22:02:24,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195515160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:24,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:24,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:24,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656347544] [2021-06-05 22:02:24,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:24,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:24,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:24,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:24,909 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 22:02:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:25,111 INFO L93 Difference]: Finished difference Result 560 states and 1622 transitions. [2021-06-05 22:02:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:25,111 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 22:02:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:25,112 INFO L225 Difference]: With dead ends: 560 [2021-06-05 22:02:25,112 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 22:02:25,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 22:02:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-06-05 22:02:25,116 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 22:02:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1049 transitions. [2021-06-05 22:02:25,116 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1049 transitions. Word has length 20 [2021-06-05 22:02:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:25,116 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1049 transitions. [2021-06-05 22:02:25,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1049 transitions. [2021-06-05 22:02:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:25,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:25,117 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-06-05 22:02:25,321 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1289416167, now seen corresponding path program 248 times [2021-06-05 22:02:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484445259] [2021-06-05 22:02:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484445259] [2021-06-05 22:02:25,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484445259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521516077] [2021-06-05 22:02:25,378 INFO L93 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 22:02:25,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:25,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:25,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:25,502 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 12 treesize of output 8 [2021-06-05 22:02:25,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:25,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,542 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 22:02:25,544 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 6 treesize of output 4 [2021-06-05 22:02:25,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:25,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,568 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:25,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:25,569 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 22:02:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:25,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521516077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:25,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:25,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:25,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432962774] [2021-06-05 22:02:25,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:25,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:25,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:25,649 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 22:02:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:25,874 INFO L93 Difference]: Finished difference Result 570 states and 1656 transitions. [2021-06-05 22:02:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:25,874 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 22:02:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:25,875 INFO L225 Difference]: With dead ends: 570 [2021-06-05 22:02:25,875 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 22:02:25,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 22:02:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 335. [2021-06-05 22:02:25,878 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 22:02:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-06-05 22:02:25,879 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-06-05 22:02:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:25,879 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-06-05 22:02:25,879 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 22:02:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-06-05 22:02:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:25,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:25,879 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:26,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:26,080 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1713208729, now seen corresponding path program 249 times [2021-06-05 22:02:26,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:26,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338933523] [2021-06-05 22:02:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:26,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:26,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338933523] [2021-06-05 22:02:26,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338933523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160584813] [2021-06-05 22:02:26,140 INFO L93 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 22:02:26,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:26,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:26,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:26,272 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 5 treesize of output 3 [2021-06-05 22:02:26,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,275 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 12 treesize of output 8 [2021-06-05 22:02:26,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:26,296 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 6 treesize of output 4 [2021-06-05 22:02:26,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:26,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,320 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:26,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:26,320 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:26,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160584813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:26,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:26,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134758653] [2021-06-05 22:02:26,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:26,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:26,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:26,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:26,397 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 22:02:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:26,619 INFO L93 Difference]: Finished difference Result 539 states and 1589 transitions. [2021-06-05 22:02:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:26,619 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 22:02:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:26,620 INFO L225 Difference]: With dead ends: 539 [2021-06-05 22:02:26,620 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 22:02:26,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 22:02:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-06-05 22:02:26,623 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 22:02:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1016 transitions. [2021-06-05 22:02:26,624 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1016 transitions. Word has length 20 [2021-06-05 22:02:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:26,624 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1016 transitions. [2021-06-05 22:02:26,624 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 22:02:26,624 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1016 transitions. [2021-06-05 22:02:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:26,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:26,624 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:26,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:26,825 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1310152695, now seen corresponding path program 250 times [2021-06-05 22:02:26,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:26,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584477344] [2021-06-05 22:02:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:26,879 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 22:02:26,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:26,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584477344] [2021-06-05 22:02:26,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584477344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049654573] [2021-06-05 22:02:26,879 INFO L93 rtionOrderModulation]: Changing 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 22:02:26,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:26,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:27,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:27,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,007 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 22:02:27,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:27,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,030 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 13 treesize of output 9 [2021-06-05 22:02:27,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,051 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:27,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:27,052 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:27,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049654573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:27,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:27,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:27,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455689396] [2021-06-05 22:02:27,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:27,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:27,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:27,127 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 22:02:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:27,317 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-06-05 22:02:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:27,317 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 22:02:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:27,318 INFO L225 Difference]: With dead ends: 505 [2021-06-05 22:02:27,318 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 22:02:27,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 22:02:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 342. [2021-06-05 22:02:27,321 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 22:02:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1043 transitions. [2021-06-05 22:02:27,322 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1043 transitions. Word has length 20 [2021-06-05 22:02:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:27,322 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1043 transitions. [2021-06-05 22:02:27,322 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 22:02:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1043 transitions. [2021-06-05 22:02:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:27,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:27,322 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:27,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2397 [2021-06-05 22:02:27,523 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash -605271231, now seen corresponding path program 251 times [2021-06-05 22:02:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:27,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073951211] [2021-06-05 22:02:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:27,580 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 22:02:27,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073951211] [2021-06-05 22:02:27,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073951211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077793944] [2021-06-05 22:02:27,580 INFO L93 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 22:02:27,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:27,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:27,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:27,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:27,752 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 6 treesize of output 4 [2021-06-05 22:02:27,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,755 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 13 treesize of output 9 [2021-06-05 22:02:27,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,777 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:27,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:27,777 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:27,851 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 22:02:27,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077793944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:27,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:27,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394796093] [2021-06-05 22:02:27,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:27,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:27,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:27,851 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 22:02:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:28,051 INFO L93 Difference]: Finished difference Result 482 states and 1437 transitions. [2021-06-05 22:02:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:28,052 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 22:02:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:28,052 INFO L225 Difference]: With dead ends: 482 [2021-06-05 22:02:28,052 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 22:02:28,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 22:02:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 329. [2021-06-05 22:02:28,056 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 22:02:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1003 transitions. [2021-06-05 22:02:28,056 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1003 transitions. Word has length 20 [2021-06-05 22:02:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:28,056 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1003 transitions. [2021-06-05 22:02:28,056 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 22:02:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1003 transitions. [2021-06-05 22:02:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:28,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:28,057 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:28,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2410,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:28,257 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1704872605, now seen corresponding path program 252 times [2021-06-05 22:02:28,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:28,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361462026] [2021-06-05 22:02:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:28,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361462026] [2021-06-05 22:02:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361462026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83011351] [2021-06-05 22:02:28,319 INFO L93 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 22:02:28,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:28,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:28,526 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 22:02:28,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83011351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:28,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:28,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:28,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961769360] [2021-06-05 22:02:28,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:28,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:28,527 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 22:02:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:28,842 INFO L93 Difference]: Finished difference Result 403 states and 1191 transitions. [2021-06-05 22:02:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:28,843 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 22:02:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:28,843 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:02:28,843 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 22:02:28,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 22:02:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 336. [2021-06-05 22:02:28,846 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 22:02:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1030 transitions. [2021-06-05 22:02:28,847 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1030 transitions. Word has length 20 [2021-06-05 22:02:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:28,847 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1030 transitions. [2021-06-05 22:02:28,847 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 22:02:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1030 transitions. [2021-06-05 22:02:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:28,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:28,847 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:29,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-06-05 22:02:29,052 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1096186969, now seen corresponding path program 253 times [2021-06-05 22:02:29,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:29,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074880817] [2021-06-05 22:02:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:29,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:29,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074880817] [2021-06-05 22:02:29,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074880817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:29,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838715883] [2021-06-05 22:02:29,114 INFO 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 22:02:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:29,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:29,331 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 22:02:29,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838715883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:29,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:29,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:29,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794100504] [2021-06-05 22:02:29,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:29,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:29,333 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 22:02:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:29,639 INFO L93 Difference]: Finished difference Result 409 states and 1198 transitions. [2021-06-05 22:02:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:29,639 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 22:02:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:29,640 INFO L225 Difference]: With dead ends: 409 [2021-06-05 22:02:29,640 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 22:02:29,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 22:02:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 333. [2021-06-05 22:02:29,644 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 22:02:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1019 transitions. [2021-06-05 22:02:29,645 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1019 transitions. Word has length 20 [2021-06-05 22:02:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:29,645 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1019 transitions. [2021-06-05 22:02:29,645 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 22:02:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1019 transitions. [2021-06-05 22:02:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:29,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:29,646 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:29,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:29,849 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1634042547, now seen corresponding path program 254 times [2021-06-05 22:02:29,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:29,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850730504] [2021-06-05 22:02:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:29,903 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 22:02:29,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:29,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850730504] [2021-06-05 22:02:29,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850730504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:29,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034478830] [2021-06-05 22:02:29,903 INFO L93 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 22:02:29,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:30,112 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 22:02:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034478830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:30,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:30,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:30,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975769929] [2021-06-05 22:02:30,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:30,113 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 22:02:30,390 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-06-05 22:02:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:30,465 INFO L93 Difference]: Finished difference Result 373 states and 1116 transitions. [2021-06-05 22:02:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:30,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:30,466 INFO L225 Difference]: With dead ends: 373 [2021-06-05 22:02:30,466 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 22:02:30,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 22:02:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 330. [2021-06-05 22:02:30,469 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 22:02:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-06-05 22:02:30,469 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-06-05 22:02:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:30,469 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-06-05 22:02:30,469 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 22:02:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-06-05 22:02:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:30,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:30,470 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:30,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:30,672 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash 113704493, now seen corresponding path program 255 times [2021-06-05 22:02:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:30,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017448556] [2021-06-05 22:02:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:30,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:30,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017448556] [2021-06-05 22:02:30,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017448556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:30,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292392864] [2021-06-05 22:02:30,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:30,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:30,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:30,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:30,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292392864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:30,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:30,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:30,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170541752] [2021-06-05 22:02:30,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:30,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:30,943 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 22:02:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:31,138 INFO L93 Difference]: Finished difference Result 487 states and 1401 transitions. [2021-06-05 22:02:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:31,138 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 22:02:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:31,139 INFO L225 Difference]: With dead ends: 487 [2021-06-05 22:02:31,139 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 22:02:31,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 22:02:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 338. [2021-06-05 22:02:31,142 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 22:02:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-06-05 22:02:31,143 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-06-05 22:02:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:31,143 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-06-05 22:02:31,143 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 22:02:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-06-05 22:02:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:31,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:31,143 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:31,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2461,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:31,357 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1380203229, now seen corresponding path program 256 times [2021-06-05 22:02:31,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:31,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104295659] [2021-06-05 22:02:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:31,417 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 22:02:31,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:31,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104295659] [2021-06-05 22:02:31,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104295659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:31,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027175542] [2021-06-05 22:02:31,417 INFO L93 rtionOrderModulation]: Changing 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 22:02:31,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:31,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:31,609 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 22:02:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027175542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:31,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:31,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:31,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227351713] [2021-06-05 22:02:31,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:31,610 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 22:02:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:31,834 INFO L93 Difference]: Finished difference Result 493 states and 1402 transitions. [2021-06-05 22:02:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:31,834 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 22:02:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:31,835 INFO L225 Difference]: With dead ends: 493 [2021-06-05 22:02:31,835 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 22:02:31,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 22:02:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 341. [2021-06-05 22:02:31,838 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 22:02:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-06-05 22:02:31,839 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-06-05 22:02:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:31,839 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-06-05 22:02:31,839 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 22:02:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-06-05 22:02:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:31,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:31,839 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:32,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:32,040 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 865104931, now seen corresponding path program 257 times [2021-06-05 22:02:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:32,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959771995] [2021-06-05 22:02:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:32,106 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 22:02:32,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959771995] [2021-06-05 22:02:32,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959771995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146720596] [2021-06-05 22:02:32,106 INFO L93 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 22:02:32,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:32,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:32,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146720596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:32,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:32,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:32,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263113841] [2021-06-05 22:02:32,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:32,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:32,318 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 22:02:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:32,505 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2021-06-05 22:02:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:32,506 INFO L225 Difference]: With dead ends: 455 [2021-06-05 22:02:32,506 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 22:02:32,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 22:02:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 334. [2021-06-05 22:02:32,509 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 22:02:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1028 transitions. [2021-06-05 22:02:32,510 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1028 transitions. Word has length 20 [2021-06-05 22:02:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:32,510 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1028 transitions. [2021-06-05 22:02:32,510 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 22:02:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1028 transitions. [2021-06-05 22:02:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:32,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:32,510 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:32,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2482,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:32,710 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2137519965, now seen corresponding path program 258 times [2021-06-05 22:02:32,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:32,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693674159] [2021-06-05 22:02:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:32,776 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 22:02:32,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:32,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693674159] [2021-06-05 22:02:32,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693674159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:32,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182395433] [2021-06-05 22:02:32,776 INFO L93 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 22:02:32,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:32,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:32,995 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 22:02:32,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182395433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:32,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:32,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:32,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211060362] [2021-06-05 22:02:32,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:32,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:32,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:32,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:32,996 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 22:02:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:33,218 INFO L93 Difference]: Finished difference Result 418 states and 1240 transitions. [2021-06-05 22:02:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:33,218 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 22:02:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:33,219 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:02:33,219 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 22:02:33,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 22:02:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 331. [2021-06-05 22:02:33,222 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 22:02:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1013 transitions. [2021-06-05 22:02:33,222 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1013 transitions. Word has length 20 [2021-06-05 22:02:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:33,222 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1013 transitions. [2021-06-05 22:02:33,222 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 22:02:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1013 transitions. [2021-06-05 22:02:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:33,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:33,223 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:33,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 22:02:33,423 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 885841459, now seen corresponding path program 259 times [2021-06-05 22:02:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:33,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412456222] [2021-06-05 22:02:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:33,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412456222] [2021-06-05 22:02:33,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412456222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941333029] [2021-06-05 22:02:33,485 INFO 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 22:02:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:33,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:33,684 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 22:02:33,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941333029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:33,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:33,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:33,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092097224] [2021-06-05 22:02:33,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:33,685 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 22:02:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:33,881 INFO L93 Difference]: Finished difference Result 455 states and 1314 transitions. [2021-06-05 22:02:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:33,882 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 22:02:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:33,882 INFO L225 Difference]: With dead ends: 455 [2021-06-05 22:02:33,882 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 22:02:33,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 22:02:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 341. [2021-06-05 22:02:33,886 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 22:02:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1040 transitions. [2021-06-05 22:02:33,886 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1040 transitions. Word has length 20 [2021-06-05 22:02:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:33,886 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1040 transitions. [2021-06-05 22:02:33,886 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 22:02:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1040 transitions. [2021-06-05 22:02:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:33,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:33,887 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:34,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:34,087 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:34,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:34,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1029582467, now seen corresponding path program 260 times [2021-06-05 22:02:34,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:34,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390046197] [2021-06-05 22:02:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:34,160 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 22:02:34,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:34,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390046197] [2021-06-05 22:02:34,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390046197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:34,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304839833] [2021-06-05 22:02:34,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:34,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:34,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:34,354 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 22:02:34,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304839833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:34,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:34,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:34,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49309710] [2021-06-05 22:02:34,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:34,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:34,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:34,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:34,355 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 22:02:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:34,569 INFO L93 Difference]: Finished difference Result 432 states and 1275 transitions. [2021-06-05 22:02:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:34,569 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 22:02:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:34,569 INFO L225 Difference]: With dead ends: 432 [2021-06-05 22:02:34,570 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 22:02:34,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 22:02:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2021-06-05 22:02:34,573 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 22:02:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-06-05 22:02:34,573 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-06-05 22:02:34,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:34,573 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-06-05 22:02:34,573 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 22:02:34,573 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-06-05 22:02:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:34,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:34,574 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:34,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2515,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:34,774 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1133016157, now seen corresponding path program 261 times [2021-06-05 22:02:34,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:34,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700377521] [2021-06-05 22:02:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:34,826 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 22:02:34,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700377521] [2021-06-05 22:02:34,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700377521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274230612] [2021-06-05 22:02:34,826 INFO L93 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 22:02:34,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:34,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:34,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:35,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274230612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:35,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:35,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:35,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919396438] [2021-06-05 22:02:35,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:35,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:35,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:35,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:35,036 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 22:02:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:35,323 INFO L93 Difference]: Finished difference Result 364 states and 1092 transitions. [2021-06-05 22:02:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:35,324 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 22:02:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:35,324 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:02:35,324 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 22:02:35,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 22:02:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 332. [2021-06-05 22:02:35,327 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 22:02:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1013 transitions. [2021-06-05 22:02:35,328 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1013 transitions. Word has length 20 [2021-06-05 22:02:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:35,328 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1013 transitions. [2021-06-05 22:02:35,328 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 22:02:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1013 transitions. [2021-06-05 22:02:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:35,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:35,328 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2522 [2021-06-05 22:02:35,529 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash -381615719, now seen corresponding path program 262 times [2021-06-05 22:02:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:35,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345928183] [2021-06-05 22:02:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:35,582 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 22:02:35,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:35,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345928183] [2021-06-05 22:02:35,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345928183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:35,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313701470] [2021-06-05 22:02:35,582 INFO L93 rtionOrderModulation]: Changing 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 22:02:35,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:35,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:35,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313701470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:35,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:35,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:35,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089030047] [2021-06-05 22:02:35,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:35,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:35,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:35,793 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 22:02:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:36,089 INFO L93 Difference]: Finished difference Result 389 states and 1144 transitions. [2021-06-05 22:02:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:36,089 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 22:02:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:36,089 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:02:36,089 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 22:02:36,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 22:02:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 342. [2021-06-05 22:02:36,093 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 22:02:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1040 transitions. [2021-06-05 22:02:36,093 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1040 transitions. Word has length 20 [2021-06-05 22:02:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:36,093 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1040 transitions. [2021-06-05 22:02:36,093 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 22:02:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1040 transitions. [2021-06-05 22:02:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:36,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:36,094 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:36,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:36,294 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1997927651, now seen corresponding path program 263 times [2021-06-05 22:02:36,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:36,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259328969] [2021-06-05 22:02:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:36,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:36,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259328969] [2021-06-05 22:02:36,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259328969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:36,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134485728] [2021-06-05 22:02:36,352 INFO L93 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 22:02:36,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:36,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:36,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:36,561 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 22:02:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134485728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:36,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:36,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684169660] [2021-06-05 22:02:36,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:36,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:36,562 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 22:02:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:36,832 INFO L93 Difference]: Finished difference Result 360 states and 1090 transitions. [2021-06-05 22:02:36,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:36,832 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 22:02:36,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:36,833 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:02:36,833 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 22:02:36,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 22:02:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 327. [2021-06-05 22:02:36,836 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 22:02:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 995 transitions. [2021-06-05 22:02:36,836 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 995 transitions. Word has length 20 [2021-06-05 22:02:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:36,836 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 995 transitions. [2021-06-05 22:02:36,836 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 22:02:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 995 transitions. [2021-06-05 22:02:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:36,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:36,837 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:37,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-06-05 22:02:37,037 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:37,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1330647072, now seen corresponding path program 264 times [2021-06-05 22:02:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:37,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430984460] [2021-06-05 22:02:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:37,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:37,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430984460] [2021-06-05 22:02:37,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430984460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:37,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408207325] [2021-06-05 22:02:37,085 INFO L93 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 22:02:37,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:37,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:37,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:37,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:37,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,252 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-06-05 22:02:37,252 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-05 22:02:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:37,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,277 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 22:02:37,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:37,277 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:20 [2021-06-05 22:02:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:37,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408207325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:37,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:37,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:02:37,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120564470] [2021-06-05 22:02:37,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:37,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:37,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:37,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:37,339 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 22:02:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:37,644 INFO L93 Difference]: Finished difference Result 462 states and 1326 transitions. [2021-06-05 22:02:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:37,644 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 22:02:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:37,645 INFO L225 Difference]: With dead ends: 462 [2021-06-05 22:02:37,645 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 22:02:37,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 22:02:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 322. [2021-06-05 22:02:37,648 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 22:02:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 970 transitions. [2021-06-05 22:02:37,648 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 970 transitions. Word has length 20 [2021-06-05 22:02:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:37,649 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 970 transitions. [2021-06-05 22:02:37,649 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 22:02:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 970 transitions. [2021-06-05 22:02:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:37,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:37,649 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:37,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2546,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:37,850 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -769808317, now seen corresponding path program 265 times [2021-06-05 22:02:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:37,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276918255] [2021-06-05 22:02:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:37,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:37,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276918255] [2021-06-05 22:02:37,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276918255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:37,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115692049] [2021-06-05 22:02:37,909 INFO 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 22:02:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:38,025 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 6 treesize of output 4 [2021-06-05 22:02:38,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:38,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,065 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:02:38,066 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 22:02:38,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:38,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:38,077 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:38,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115692049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:38,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:38,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:38,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38701666] [2021-06-05 22:02:38,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:38,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:38,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:38,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:38,116 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 22:02:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:38,287 INFO L93 Difference]: Finished difference Result 484 states and 1407 transitions. [2021-06-05 22:02:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:38,287 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 22:02:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:38,288 INFO L225 Difference]: With dead ends: 484 [2021-06-05 22:02:38,288 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 22:02:38,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 22:02:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 336. [2021-06-05 22:02:38,291 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 22:02:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1019 transitions. [2021-06-05 22:02:38,292 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1019 transitions. Word has length 20 [2021-06-05 22:02:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:38,292 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1019 transitions. [2021-06-05 22:02:38,292 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 22:02:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1019 transitions. [2021-06-05 22:02:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:38,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:38,292 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:38,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2555 [2021-06-05 22:02:38,493 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash 388835213, now seen corresponding path program 266 times [2021-06-05 22:02:38,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:38,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643060795] [2021-06-05 22:02:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:38,545 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 22:02:38,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:38,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643060795] [2021-06-05 22:02:38,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643060795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:38,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608716158] [2021-06-05 22:02:38,545 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 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 22:02:38,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:38,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:38,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:38,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,665 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 13 treesize of output 9 [2021-06-05 22:02:38,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,703 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 22:02:38,706 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 22:02:38,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,727 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 22:02:38,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-05 22:02:38,727 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:02:38,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:38,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:02:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608716158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162164571] [2021-06-05 22:02:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:38,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:38,772 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 22:02:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:39,036 INFO L93 Difference]: Finished difference Result 536 states and 1528 transitions. [2021-06-05 22:02:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:39,036 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 22:02:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:39,037 INFO L225 Difference]: With dead ends: 536 [2021-06-05 22:02:39,037 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 22:02:39,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 22:02:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 342. [2021-06-05 22:02:39,040 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 22:02:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1044 transitions. [2021-06-05 22:02:39,041 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1044 transitions. Word has length 20 [2021-06-05 22:02:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:39,041 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1044 transitions. [2021-06-05 22:02:39,041 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 22:02:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1044 transitions. [2021-06-05 22:02:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:39,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:39,042 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:39,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2564 [2021-06-05 22:02:39,242 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:39,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1105072509, now seen corresponding path program 267 times [2021-06-05 22:02:39,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:39,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636793170] [2021-06-05 22:02:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:39,290 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 22:02:39,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636793170] [2021-06-05 22:02:39,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636793170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842258539] [2021-06-05 22:02:39,290 INFO L93 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 22:02:39,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:39,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:39,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:39,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:39,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:39,439 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:02:39,439 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 22:02:39,440 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 22:02:39,441 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 12 treesize of output 8 [2021-06-05 22:02:39,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:39,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:39,463 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:02:39,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:39,463 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:02:39,511 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 22:02:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842258539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:39,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:39,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:39,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391061718] [2021-06-05 22:02:39,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:39,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:39,512 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 22:02:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:39,677 INFO L93 Difference]: Finished difference Result 493 states and 1419 transitions. [2021-06-05 22:02:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:39,677 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 22:02:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:39,677 INFO L225 Difference]: With dead ends: 493 [2021-06-05 22:02:39,678 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 22:02:39,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 22:02:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 340. [2021-06-05 22:02:39,681 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 22:02:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1033 transitions. [2021-06-05 22:02:39,681 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1033 transitions. Word has length 20 [2021-06-05 22:02:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:39,681 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1033 transitions. [2021-06-05 22:02:39,681 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 22:02:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1033 transitions. [2021-06-05 22:02:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:39,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:39,682 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:39,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2576,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:39,882 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:39,883 INFO L82 PathProgramCache]: Analyzing trace with hash -359295832, now seen corresponding path program 268 times [2021-06-05 22:02:39,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:39,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16578068] [2021-06-05 22:02:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:39,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:39,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16578068] [2021-06-05 22:02:39,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16578068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:39,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749025502] [2021-06-05 22:02:39,928 INFO L93 rtionOrderModulation]: Changing 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 22:02:39,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:40,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:40,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:40,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:40,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,096 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.3 percent of original size [2021-06-05 22:02:40,098 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 6 treesize of output 4 [2021-06-05 22:02:40,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,120 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 22:02:40,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:40,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 22:02:40,177 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 22:02:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749025502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:40,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:40,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:02:40,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913119250] [2021-06-05 22:02:40,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:40,178 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 22:02:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:40,530 INFO L93 Difference]: Finished difference Result 438 states and 1286 transitions. [2021-06-05 22:02:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:40,530 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 22:02:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:40,531 INFO L225 Difference]: With dead ends: 438 [2021-06-05 22:02:40,531 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:02:40,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:02:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:02:40,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 331. [2021-06-05 22:02:40,534 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 22:02:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-06-05 22:02:40,534 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-06-05 22:02:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:40,534 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-06-05 22:02:40,534 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 22:02:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-06-05 22:02:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:40,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:40,535 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:40,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 22:02:40,735 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:40,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1048768781, now seen corresponding path program 269 times [2021-06-05 22:02:40,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:40,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633978901] [2021-06-05 22:02:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:40,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633978901] [2021-06-05 22:02:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633978901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592917435] [2021-06-05 22:02:40,789 INFO L93 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 22:02:40,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:40,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:40,911 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 22:02:40,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,944 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 22:02:40,944 INFO L518 ElimStorePlain]: Eliminatee v_prenex_92 vanished before elimination [2021-06-05 22:02:40,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:40,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,948 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 13 treesize of output 9 [2021-06-05 22:02:40,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,968 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:02:40,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:40,969 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:41,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592917435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:41,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:41,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:02:41,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105534239] [2021-06-05 22:02:41,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:02:41,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:41,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:02:41,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:41,035 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 22:02:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:41,255 INFO L93 Difference]: Finished difference Result 586 states and 1687 transitions. [2021-06-05 22:02:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:41,255 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 22:02:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:41,256 INFO L225 Difference]: With dead ends: 586 [2021-06-05 22:02:41,256 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 22:02:41,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 22:02:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 337. [2021-06-05 22:02:41,260 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 22:02:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1022 transitions. [2021-06-05 22:02:41,260 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1022 transitions. Word has length 20 [2021-06-05 22:02:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:41,260 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1022 transitions. [2021-06-05 22:02:41,260 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 22:02:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1022 transitions. [2021-06-05 22:02:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:41,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:41,261 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:41,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2599,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:41,461 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:41,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1613147123, now seen corresponding path program 270 times [2021-06-05 22:02:41,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:41,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501898032] [2021-06-05 22:02:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:41,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:41,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501898032] [2021-06-05 22:02:41,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501898032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:41,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621704713] [2021-06-05 22:02:41,515 INFO L93 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 22:02:41,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:41,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:41,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:02:41,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:41,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:41,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,688 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:02:41,690 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 12 treesize of output 8 [2021-06-05 22:02:41,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:41,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,712 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:02:41,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:41,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:41,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621704713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:41,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:41,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:41,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21846380] [2021-06-05 22:02:41,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:41,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:41,762 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 22:02:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:41,900 INFO L93 Difference]: Finished difference Result 553 states and 1605 transitions. [2021-06-05 22:02:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:41,900 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 22:02:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:41,901 INFO L225 Difference]: With dead ends: 553 [2021-06-05 22:02:41,901 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 22:02:41,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 22:02:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 340. [2021-06-05 22:02:41,904 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 22:02:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1037 transitions. [2021-06-05 22:02:41,905 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1037 transitions. Word has length 20 [2021-06-05 22:02:41,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:41,905 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1037 transitions. [2021-06-05 22:02:41,905 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 22:02:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1037 transitions. [2021-06-05 22:02:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:41,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:41,905 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:42,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:42,106 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash 724683217, now seen corresponding path program 271 times [2021-06-05 22:02:42,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:42,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121506659] [2021-06-05 22:02:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:42,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:42,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121506659] [2021-06-05 22:02:42,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121506659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:42,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459424212] [2021-06-05 22:02:42,161 INFO 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 22:02:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:42,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:42,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:42,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,276 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 13 treesize of output 9 [2021-06-05 22:02:42,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,300 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:02:42,301 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 12 treesize of output 8 [2021-06-05 22:02:42,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:42,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:42,311 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:42,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459424212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:42,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:42,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:02:42,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284413110] [2021-06-05 22:02:42,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:02:42,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:02:42,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:02:42,358 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 22:02:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:42,532 INFO L93 Difference]: Finished difference Result 520 states and 1528 transitions. [2021-06-05 22:02:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:42,532 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 22:02:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:42,533 INFO L225 Difference]: With dead ends: 520 [2021-06-05 22:02:42,533 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 22:02:42,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 22:02:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 331. [2021-06-05 22:02:42,536 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 22:02:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-06-05 22:02:42,537 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-06-05 22:02:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:42,537 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-06-05 22:02:42,537 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 22:02:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-06-05 22:02:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:42,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:42,537 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:42,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2620,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:42,738 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:42,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2013633307, now seen corresponding path program 272 times [2021-06-05 22:02:42,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:42,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237788414] [2021-06-05 22:02:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:42,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237788414] [2021-06-05 22:02:42,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237788414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164932405] [2021-06-05 22:02:42,794 INFO L93 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 22:02:42,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:42,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:42,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,947 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:02:42,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-06-05 22:02:42,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:42,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:42,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,971 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:02:42,971 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:02:42,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:42,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:02:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:43,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164932405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:43,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:43,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949495875] [2021-06-05 22:02:43,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:43,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:43,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:43,047 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 22:02:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:43,347 INFO L93 Difference]: Finished difference Result 651 states and 1812 transitions. [2021-06-05 22:02:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:43,347 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 22:02:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:43,348 INFO L225 Difference]: With dead ends: 651 [2021-06-05 22:02:43,348 INFO L226 Difference]: Without dead ends: 651 [2021-06-05 22:02:43,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-05 22:02:43,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 339. [2021-06-05 22:02:43,352 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 22:02:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1034 transitions. [2021-06-05 22:02:43,353 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1034 transitions. Word has length 20 [2021-06-05 22:02:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:43,353 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1034 transitions. [2021-06-05 22:02:43,353 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 22:02:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1034 transitions. [2021-06-05 22:02:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:43,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:43,353 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:43,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:43,554 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash 519725585, now seen corresponding path program 273 times [2021-06-05 22:02:43,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:43,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341159169] [2021-06-05 22:02:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:43,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:43,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341159169] [2021-06-05 22:02:43,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341159169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:43,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761392038] [2021-06-05 22:02:43,607 INFO L93 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 22:02:43,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:43,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:43,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:43,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:43,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,764 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 22:02:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:43,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:43,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:43,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:43,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,809 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:02:43,809 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:02:43,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:43,809 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 22:02:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761392038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:43,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:43,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:43,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668183188] [2021-06-05 22:02:43,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:43,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:43,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:43,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:43,885 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 22:02:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:44,090 INFO L93 Difference]: Finished difference Result 585 states and 1658 transitions. [2021-06-05 22:02:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:44,090 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 22:02:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:44,091 INFO L225 Difference]: With dead ends: 585 [2021-06-05 22:02:44,091 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 22:02:44,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 22:02:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 22:02:44,094 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 22:02:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-06-05 22:02:44,095 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-06-05 22:02:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:44,095 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-06-05 22:02:44,095 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 22:02:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-06-05 22:02:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:44,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:44,095 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:44,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-06-05 22:02:44,296 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1529933551, now seen corresponding path program 274 times [2021-06-05 22:02:44,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:44,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724479780] [2021-06-05 22:02:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:44,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724479780] [2021-06-05 22:02:44,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724479780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621074609] [2021-06-05 22:02:44,353 INFO L93 rtionOrderModulation]: Changing 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 22:02:44,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:44,473 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 6 treesize of output 4 [2021-06-05 22:02:44,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,516 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 22:02:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:44,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,521 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 22:02:44,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,545 INFO L628 ElimStorePlain]: treesize reduction 7, result has 79.4 percent of original size [2021-06-05 22:02:44,546 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 12 treesize of output 8 [2021-06-05 22:02:44,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:44,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:44,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 22:02:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:44,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621074609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:44,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:44,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:44,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945860044] [2021-06-05 22:02:44,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:44,638 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 22:02:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:44,857 INFO L93 Difference]: Finished difference Result 610 states and 1747 transitions. [2021-06-05 22:02:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:44,858 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 22:02:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:44,858 INFO L225 Difference]: With dead ends: 610 [2021-06-05 22:02:44,858 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 22:02:44,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 22:02:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 336. [2021-06-05 22:02:44,862 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 22:02:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1024 transitions. [2021-06-05 22:02:44,863 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1024 transitions. Word has length 20 [2021-06-05 22:02:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:44,863 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1024 transitions. [2021-06-05 22:02:44,863 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 22:02:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1024 transitions. [2021-06-05 22:02:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:44,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:44,863 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:45,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2650 [2021-06-05 22:02:45,064 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash -237591151, now seen corresponding path program 275 times [2021-06-05 22:02:45,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:45,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046636767] [2021-06-05 22:02:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:45,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:45,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046636767] [2021-06-05 22:02:45,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046636767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:45,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583325450] [2021-06-05 22:02:45,121 INFO L93 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 22:02:45,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:45,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:45,235 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 6 treesize of output 4 [2021-06-05 22:02:45,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:45,238 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 22:02:45,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:45,273 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-05 22:02:45,276 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 22:02:45,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:45,298 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 22:02:45,298 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-06-05 22:02:45,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:45,300 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:45,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:45,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:45,310 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 22:02:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:45,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583325450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:45,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:45,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:45,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905031219] [2021-06-05 22:02:45,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:45,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:45,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:45,390 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 22:02:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:45,587 INFO L93 Difference]: Finished difference Result 579 states and 1680 transitions. [2021-06-05 22:02:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:45,588 INFO L225 Difference]: With dead ends: 579 [2021-06-05 22:02:45,588 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 22:02:45,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 22:02:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 22:02:45,591 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 22:02:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-06-05 22:02:45,592 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-06-05 22:02:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:45,592 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-06-05 22:02:45,592 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 22:02:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-06-05 22:02:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:45,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:45,592 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:45,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2663 [2021-06-05 22:02:45,793 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1509197023, now seen corresponding path program 276 times [2021-06-05 22:02:45,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:45,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464653027] [2021-06-05 22:02:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:45,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:45,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464653027] [2021-06-05 22:02:45,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464653027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:45,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146106905] [2021-06-05 22:02:45,847 INFO L93 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 22:02:45,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:45,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:02:45,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:45,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:45,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,020 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:02:46,022 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 22:02:46,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:46,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,043 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:02:46,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:46,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:02:46,120 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 22:02:46,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146106905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:46,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:46,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:46,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312059779] [2021-06-05 22:02:46,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:46,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:46,121 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 22:02:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:46,302 INFO L93 Difference]: Finished difference Result 533 states and 1527 transitions. [2021-06-05 22:02:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:46,302 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 22:02:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:46,303 INFO L225 Difference]: With dead ends: 533 [2021-06-05 22:02:46,303 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 22:02:46,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:46,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 22:02:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 337. [2021-06-05 22:02:46,306 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 22:02:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1023 transitions. [2021-06-05 22:02:46,307 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1023 transitions. Word has length 20 [2021-06-05 22:02:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:46,307 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1023 transitions. [2021-06-05 22:02:46,307 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 22:02:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1023 transitions. [2021-06-05 22:02:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:46,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:46,307 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:46,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2672 [2021-06-05 22:02:46,508 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash 870346347, now seen corresponding path program 277 times [2021-06-05 22:02:46,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:46,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843922458] [2021-06-05 22:02:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:46,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:46,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843922458] [2021-06-05 22:02:46,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843922458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:46,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301528735] [2021-06-05 22:02:46,564 INFO 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 22:02:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:46,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:46,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,720 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 22:02:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:46,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:46,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:02:46,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:46,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,768 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:02:46,768 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:02:46,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:46,768 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 22:02:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:46,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301528735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:46,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:46,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:46,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936524023] [2021-06-05 22:02:46,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:46,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:46,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:46,843 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 22:02:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:47,073 INFO L93 Difference]: Finished difference Result 539 states and 1548 transitions. [2021-06-05 22:02:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:47,073 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 22:02:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:47,074 INFO L225 Difference]: With dead ends: 539 [2021-06-05 22:02:47,074 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 22:02:47,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 22:02:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-06-05 22:02:47,077 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 22:02:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1005 transitions. [2021-06-05 22:02:47,078 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1005 transitions. Word has length 20 [2021-06-05 22:02:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:47,078 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1005 transitions. [2021-06-05 22:02:47,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1005 transitions. [2021-06-05 22:02:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:47,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:47,078 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:47,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-06-05 22:02:47,278 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:47,279 INFO L82 PathProgramCache]: Analyzing trace with hash -12009309, now seen corresponding path program 278 times [2021-06-05 22:02:47,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:47,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226131937] [2021-06-05 22:02:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:47,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:47,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226131937] [2021-06-05 22:02:47,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226131937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:47,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521695444] [2021-06-05 22:02:47,337 INFO L93 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 22:02:47,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:47,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:47,468 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 22:02:47,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:47,470 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 13 treesize of output 9 [2021-06-05 22:02:47,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:47,484 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:02:47,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:47,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:02:47,520 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 22:02:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521695444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:47,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:47,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:02:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709489248] [2021-06-05 22:02:47,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:02:47,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:02:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:02:47,521 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 22:02:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:47,667 INFO L93 Difference]: Finished difference Result 469 states and 1387 transitions. [2021-06-05 22:02:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:47,667 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 22:02:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:47,668 INFO L225 Difference]: With dead ends: 469 [2021-06-05 22:02:47,668 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 22:02:47,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 22:02:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 335. [2021-06-05 22:02:47,671 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 22:02:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1011 transitions. [2021-06-05 22:02:47,672 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1011 transitions. Word has length 20 [2021-06-05 22:02:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:47,672 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1011 transitions. [2021-06-05 22:02:47,672 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 22:02:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1011 transitions. [2021-06-05 22:02:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:47,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:47,672 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:47,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:47,873 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1621042083, now seen corresponding path program 279 times [2021-06-05 22:02:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:47,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504584469] [2021-06-05 22:02:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:47,925 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 22:02:47,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504584469] [2021-06-05 22:02:47,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504584469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563897204] [2021-06-05 22:02:47,925 INFO L93 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 22:02:48,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:48,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:48,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:48,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:48,065 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 12 treesize of output 8 [2021-06-05 22:02:48,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,067 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 13 treesize of output 9 [2021-06-05 22:02:48,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,082 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:02:48,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:48,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:02:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:48,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563897204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:48,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:48,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:48,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086950788] [2021-06-05 22:02:48,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:48,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:48,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:48,137 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 22:02:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:48,321 INFO L93 Difference]: Finished difference Result 473 states and 1379 transitions. [2021-06-05 22:02:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:48,322 INFO L225 Difference]: With dead ends: 473 [2021-06-05 22:02:48,322 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 22:02:48,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 22:02:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2021-06-05 22:02:48,325 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 22:02:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2021-06-05 22:02:48,326 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2021-06-05 22:02:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:48,326 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2021-06-05 22:02:48,326 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 22:02:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2021-06-05 22:02:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:48,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:48,326 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:48,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2698 [2021-06-05 22:02:48,527 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash -336094873, now seen corresponding path program 280 times [2021-06-05 22:02:48,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:48,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564836361] [2021-06-05 22:02:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:48,607 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 22:02:48,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:48,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564836361] [2021-06-05 22:02:48,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564836361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:48,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719760795] [2021-06-05 22:02:48,607 INFO L93 rtionOrderModulation]: Changing 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 22:02:48,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:48,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:48,775 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 12 treesize of output 8 [2021-06-05 22:02:48,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:48,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,820 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:02:48,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:48,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:02:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:48,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719760795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:48,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:48,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:48,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045920363] [2021-06-05 22:02:48,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:48,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:48,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:48,883 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 22:02:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:49,087 INFO L93 Difference]: Finished difference Result 430 states and 1282 transitions. [2021-06-05 22:02:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:49,088 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 22:02:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:49,088 INFO L225 Difference]: With dead ends: 430 [2021-06-05 22:02:49,088 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 22:02:49,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 22:02:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 317. [2021-06-05 22:02:49,091 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 22:02:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-06-05 22:02:49,092 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 20 [2021-06-05 22:02:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:49,092 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-06-05 22:02:49,092 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 22:02:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-06-05 22:02:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:49,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:49,092 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:49,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2705 [2021-06-05 22:02:49,293 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash 284238669, now seen corresponding path program 281 times [2021-06-05 22:02:49,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:49,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700074797] [2021-06-05 22:02:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:49,348 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 22:02:49,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:49,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700074797] [2021-06-05 22:02:49,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700074797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:49,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201054435] [2021-06-05 22:02:49,349 INFO L93 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 22:02:49,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:49,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201054435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:49,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:49,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:49,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658461333] [2021-06-05 22:02:49,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:49,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:49,513 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 22:02:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:49,655 INFO L93 Difference]: Finished difference Result 383 states and 1124 transitions. [2021-06-05 22:02:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:49,656 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 22:02:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:49,656 INFO L225 Difference]: With dead ends: 383 [2021-06-05 22:02:49,656 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 22:02:49,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 22:02:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 323. [2021-06-05 22:02:49,659 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 22:02:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 22:02:49,660 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 22:02:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:49,660 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 22:02:49,660 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 22:02:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 22:02:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:49,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:49,660 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:49,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:49,861 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1672898287, now seen corresponding path program 282 times [2021-06-05 22:02:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:49,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588497049] [2021-06-05 22:02:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:49,918 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 22:02:49,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588497049] [2021-06-05 22:02:49,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588497049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964974576] [2021-06-05 22:02:49,918 INFO L93 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 22:02:49,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:50,079 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 22:02:50,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964974576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:50,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:50,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847593205] [2021-06-05 22:02:50,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:50,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:50,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:50,080 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 22:02:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:50,266 INFO L93 Difference]: Finished difference Result 389 states and 1139 transitions. [2021-06-05 22:02:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:50,266 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 22:02:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:50,266 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:02:50,266 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:02:50,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:02:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 320. [2021-06-05 22:02:50,269 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 22:02:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 957 transitions. [2021-06-05 22:02:50,270 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 957 transitions. Word has length 20 [2021-06-05 22:02:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:50,270 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 957 transitions. [2021-06-05 22:02:50,270 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 22:02:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 957 transitions. [2021-06-05 22:02:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:50,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:50,270 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:50,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:50,471 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1670272511, now seen corresponding path program 283 times [2021-06-05 22:02:50,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:50,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201315282] [2021-06-05 22:02:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:50,523 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 22:02:50,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:50,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201315282] [2021-06-05 22:02:50,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201315282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533897846] [2021-06-05 22:02:50,524 INFO 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 22:02:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:50,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:50,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:50,693 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 22:02:50,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533897846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:50,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:50,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100786772] [2021-06-05 22:02:50,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:50,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:50,694 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 22:02:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:50,839 INFO L93 Difference]: Finished difference Result 347 states and 1032 transitions. [2021-06-05 22:02:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:50,839 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 22:02:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:50,839 INFO L225 Difference]: With dead ends: 347 [2021-06-05 22:02:50,839 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 22:02:50,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 22:02:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 311. [2021-06-05 22:02:50,842 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 22:02:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 927 transitions. [2021-06-05 22:02:50,842 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 927 transitions. Word has length 20 [2021-06-05 22:02:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:50,843 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 927 transitions. [2021-06-05 22:02:50,843 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 22:02:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 927 transitions. [2021-06-05 22:02:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:50,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:50,843 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:51,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2724 [2021-06-05 22:02:51,043 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:51,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash 528543981, now seen corresponding path program 284 times [2021-06-05 22:02:51,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:51,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506964167] [2021-06-05 22:02:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:51,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:51,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506964167] [2021-06-05 22:02:51,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506964167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:51,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086142009] [2021-06-05 22:02:51,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:51,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:51,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:51,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086142009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:51,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:51,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:51,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435597424] [2021-06-05 22:02:51,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:51,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:51,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:51,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:51,319 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 22:02:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:51,556 INFO L93 Difference]: Finished difference Result 521 states and 1462 transitions. [2021-06-05 22:02:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:51,557 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 22:02:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:51,557 INFO L225 Difference]: With dead ends: 521 [2021-06-05 22:02:51,557 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 22:02:51,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 22:02:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 321. [2021-06-05 22:02:51,561 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 22:02:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 972 transitions. [2021-06-05 22:02:51,561 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 972 transitions. Word has length 20 [2021-06-05 22:02:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:51,561 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 972 transitions. [2021-06-05 22:02:51,561 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 22:02:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 972 transitions. [2021-06-05 22:02:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:51,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:51,562 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:51,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2727,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:51,762 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash -965363741, now seen corresponding path program 285 times [2021-06-05 22:02:51,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:51,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659814291] [2021-06-05 22:02:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:51,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:51,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659814291] [2021-06-05 22:02:51,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659814291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:51,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084571709] [2021-06-05 22:02:51,823 INFO L93 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 22:02:51,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:51,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:52,021 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 22:02:52,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084571709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:52,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:52,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:52,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057742046] [2021-06-05 22:02:52,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:52,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:52,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:52,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:52,022 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 22:02:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:52,205 INFO L93 Difference]: Finished difference Result 455 states and 1308 transitions. [2021-06-05 22:02:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:52,206 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 22:02:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:52,206 INFO L225 Difference]: With dead ends: 455 [2021-06-05 22:02:52,206 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 22:02:52,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 22:02:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 324. [2021-06-05 22:02:52,209 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 22:02:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-06-05 22:02:52,210 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-06-05 22:02:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:52,210 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-06-05 22:02:52,210 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 22:02:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-06-05 22:02:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:52,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:52,210 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:52,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:52,411 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1279944419, now seen corresponding path program 286 times [2021-06-05 22:02:52,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:52,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964468656] [2021-06-05 22:02:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:52,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:52,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964468656] [2021-06-05 22:02:52,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964468656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:52,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166960024] [2021-06-05 22:02:52,483 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 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 22:02:52,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:52,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:52,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:52,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166960024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:52,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:52,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:52,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497681202] [2021-06-05 22:02:52,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:52,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:52,690 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 22:02:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:52,930 INFO L93 Difference]: Finished difference Result 526 states and 1506 transitions. [2021-06-05 22:02:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:52,930 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 22:02:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:52,931 INFO L225 Difference]: With dead ends: 526 [2021-06-05 22:02:52,931 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 22:02:52,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 22:02:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 327. [2021-06-05 22:02:52,934 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 22:02:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 989 transitions. [2021-06-05 22:02:52,935 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 989 transitions. Word has length 20 [2021-06-05 22:02:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:52,935 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 989 transitions. [2021-06-05 22:02:52,935 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 22:02:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 989 transitions. [2021-06-05 22:02:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:52,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:52,935 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:53,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2742,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:53,136 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1722680477, now seen corresponding path program 287 times [2021-06-05 22:02:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:53,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055490281] [2021-06-05 22:02:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:53,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:53,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055490281] [2021-06-05 22:02:53,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055490281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:53,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225411781] [2021-06-05 22:02:53,198 INFO L93 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 22:02:53,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:53,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:53,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:53,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225411781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:53,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:53,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:53,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175318756] [2021-06-05 22:02:53,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:53,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:53,391 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 22:02:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:53,557 INFO L93 Difference]: Finished difference Result 495 states and 1439 transitions. [2021-06-05 22:02:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:53,558 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 22:02:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:53,558 INFO L225 Difference]: With dead ends: 495 [2021-06-05 22:02:53,558 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 22:02:53,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 22:02:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 324. [2021-06-05 22:02:53,562 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 22:02:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-06-05 22:02:53,562 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-06-05 22:02:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:53,562 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-06-05 22:02:53,562 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 22:02:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-06-05 22:02:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:53,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:53,563 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:53,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-06-05 22:02:53,763 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:53,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1300680947, now seen corresponding path program 288 times [2021-06-05 22:02:53,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:53,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697161259] [2021-06-05 22:02:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:53,820 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 22:02:53,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:53,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697161259] [2021-06-05 22:02:53,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697161259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:53,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27771047] [2021-06-05 22:02:53,821 INFO L93 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 22:02:53,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:53,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:53,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:54,011 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 22:02:54,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27771047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:54,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:54,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216199248] [2021-06-05 22:02:54,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:54,012 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 22:02:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:54,160 INFO L93 Difference]: Finished difference Result 492 states and 1387 transitions. [2021-06-05 22:02:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:54,160 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 22:02:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:54,161 INFO L225 Difference]: With dead ends: 492 [2021-06-05 22:02:54,161 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 22:02:54,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 22:02:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-06-05 22:02:54,164 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 22:02:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 988 transitions. [2021-06-05 22:02:54,165 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 988 transitions. Word has length 20 [2021-06-05 22:02:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:54,165 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 988 transitions. [2021-06-05 22:02:54,165 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 22:02:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 988 transitions. [2021-06-05 22:02:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:54,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:54,165 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:54,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:54,366 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash -614742979, now seen corresponding path program 289 times [2021-06-05 22:02:54,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:54,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831212762] [2021-06-05 22:02:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:54,433 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 22:02:54,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:54,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831212762] [2021-06-05 22:02:54,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831212762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:54,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443053454] [2021-06-05 22:02:54,433 INFO 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 22:02:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:54,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:54,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:54,614 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 22:02:54,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443053454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:54,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:54,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:54,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68413970] [2021-06-05 22:02:54,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:54,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:54,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:54,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:54,615 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 22:02:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:54,828 INFO L93 Difference]: Finished difference Result 498 states and 1408 transitions. [2021-06-05 22:02:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:54,829 INFO L225 Difference]: With dead ends: 498 [2021-06-05 22:02:54,829 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 22:02:54,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 22:02:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 325. [2021-06-05 22:02:54,832 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 22:02:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-06-05 22:02:54,833 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-06-05 22:02:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:54,833 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-06-05 22:02:54,833 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 22:02:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-06-05 22:02:54,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:54,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:54,833 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:55,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2766 [2021-06-05 22:02:55,034 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash -832484211, now seen corresponding path program 290 times [2021-06-05 22:02:55,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:55,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187746637] [2021-06-05 22:02:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:55,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187746637] [2021-06-05 22:02:55,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187746637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886096218] [2021-06-05 22:02:55,095 INFO L93 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 22:02:55,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:55,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:55,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886096218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:55,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:55,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180575494] [2021-06-05 22:02:55,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:55,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:55,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:55,265 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 22:02:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:55,458 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2021-06-05 22:02:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:55,459 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 22:02:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:55,459 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:02:55,459 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 22:02:55,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 22:02:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-06-05 22:02:55,462 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 22:02:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 980 transitions. [2021-06-05 22:02:55,463 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 980 transitions. Word has length 20 [2021-06-05 22:02:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:55,463 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 980 transitions. [2021-06-05 22:02:55,463 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 22:02:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 980 transitions. [2021-06-05 22:02:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:55,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:55,463 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:55,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2774,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:55,664 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash 459858189, now seen corresponding path program 291 times [2021-06-05 22:02:55,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:55,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618548532] [2021-06-05 22:02:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618548532] [2021-06-05 22:02:55,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618548532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452006050] [2021-06-05 22:02:55,724 INFO L93 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 22:02:55,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:55,885 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 22:02:55,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452006050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:55,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:55,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978309928] [2021-06-05 22:02:55,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:55,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:55,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:55,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:55,886 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 22:02:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:56,088 INFO L93 Difference]: Finished difference Result 425 states and 1247 transitions. [2021-06-05 22:02:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:56,089 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 22:02:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:56,089 INFO L225 Difference]: With dead ends: 425 [2021-06-05 22:02:56,089 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 22:02:56,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 22:02:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 315. [2021-06-05 22:02:56,092 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 22:02:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 943 transitions. [2021-06-05 22:02:56,093 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 943 transitions. Word has length 20 [2021-06-05 22:02:56,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:56,093 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 943 transitions. [2021-06-05 22:02:56,093 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 22:02:56,093 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 943 transitions. [2021-06-05 22:02:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:56,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:56,093 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:56,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2780,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:56,294 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1436006847, now seen corresponding path program 292 times [2021-06-05 22:02:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:56,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690219791] [2021-06-05 22:02:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:56,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:56,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690219791] [2021-06-05 22:02:56,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690219791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:56,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052402017] [2021-06-05 22:02:56,356 INFO L93 rtionOrderModulation]: Changing 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 22:02:56,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:56,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052402017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:56,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:56,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172521631] [2021-06-05 22:02:56,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:56,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:56,551 INFO L87 Difference]: Start difference. First operand 315 states and 943 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:56,721 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2021-06-05 22:02:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:56,722 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 22:02:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:56,722 INFO L225 Difference]: With dead ends: 386 [2021-06-05 22:02:56,722 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 22:02:56,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 22:02:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 312. [2021-06-05 22:02:56,725 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 22:02:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-06-05 22:02:56,725 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-06-05 22:02:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:56,725 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-06-05 22:02:56,725 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 22:02:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-06-05 22:02:56,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:56,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:56,726 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:56,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2786,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:56,926 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:56,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2079204861, now seen corresponding path program 293 times [2021-06-05 22:02:56,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:56,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762129926] [2021-06-05 22:02:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:56,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:56,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762129926] [2021-06-05 22:02:56,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762129926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:56,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335661420] [2021-06-05 22:02:56,981 INFO L93 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 22:02:57,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:57,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:57,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:57,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335661420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:57,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:57,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:57,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054082871] [2021-06-05 22:02:57,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:57,143 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 22:02:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:57,315 INFO L93 Difference]: Finished difference Result 393 states and 1130 transitions. [2021-06-05 22:02:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:57,315 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 22:02:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:57,315 INFO L225 Difference]: With dead ends: 393 [2021-06-05 22:02:57,315 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 22:02:57,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 22:02:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 326. [2021-06-05 22:02:57,318 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 22:02:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-06-05 22:02:57,319 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-06-05 22:02:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:57,319 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-06-05 22:02:57,319 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 22:02:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-06-05 22:02:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:57,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:57,319 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:57,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2791,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:57,520 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash 300338509, now seen corresponding path program 294 times [2021-06-05 22:02:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:57,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644097710] [2021-06-05 22:02:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:57,576 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 22:02:57,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:57,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644097710] [2021-06-05 22:02:57,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644097710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:57,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027146983] [2021-06-05 22:02:57,576 INFO L93 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 22:02:57,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:57,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:57,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:57,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:57,740 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 22:02:57,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027146983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:57,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:57,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:57,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474959125] [2021-06-05 22:02:57,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:57,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:57,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:57,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:57,740 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 22:02:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:57,926 INFO L93 Difference]: Finished difference Result 399 states and 1151 transitions. [2021-06-05 22:02:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:57,926 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 22:02:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:57,927 INFO L225 Difference]: With dead ends: 399 [2021-06-05 22:02:57,927 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 22:02:57,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 22:02:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-06-05 22:02:57,930 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 22:02:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 965 transitions. [2021-06-05 22:02:57,930 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 965 transitions. Word has length 20 [2021-06-05 22:02:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:57,930 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 965 transitions. [2021-06-05 22:02:57,930 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 22:02:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 965 transitions. [2021-06-05 22:02:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:57,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:57,931 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:58,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-06-05 22:02:58,131 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:58,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1340574307, now seen corresponding path program 295 times [2021-06-05 22:02:58,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:58,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813522864] [2021-06-05 22:02:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:58,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:58,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813522864] [2021-06-05 22:02:58,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813522864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:58,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087760932] [2021-06-05 22:02:58,188 INFO 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 22:02:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:58,353 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 22:02:58,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087760932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:58,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:58,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:58,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001420667] [2021-06-05 22:02:58,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:58,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:58,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:58,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:58,354 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 22:02:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:58,535 INFO L93 Difference]: Finished difference Result 368 states and 1086 transitions. [2021-06-05 22:02:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:58,536 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 22:02:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:58,536 INFO L225 Difference]: With dead ends: 368 [2021-06-05 22:02:58,536 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 22:02:58,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:58,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 22:02:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 309. [2021-06-05 22:02:58,539 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 22:02:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 921 transitions. [2021-06-05 22:02:58,539 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 921 transitions. Word has length 20 [2021-06-05 22:02:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:58,539 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 921 transitions. [2021-06-05 22:02:58,539 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 22:02:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 921 transitions. [2021-06-05 22:02:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:58,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:58,540 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:58,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:58,740 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:58,741 INFO L82 PathProgramCache]: Analyzing trace with hash -498001455, now seen corresponding path program 296 times [2021-06-05 22:02:58,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:58,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391488402] [2021-06-05 22:02:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:58,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:58,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391488402] [2021-06-05 22:02:58,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391488402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:58,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591147069] [2021-06-05 22:02:58,809 INFO L93 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 22:02:58,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:58,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:59,006 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 22:02:59,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591147069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:59,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:59,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:59,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414330006] [2021-06-05 22:02:59,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:59,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:59,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:59,007 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 22:02:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:59,256 INFO L93 Difference]: Finished difference Result 369 states and 1070 transitions. [2021-06-05 22:02:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:59,257 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 22:02:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:59,257 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:02:59,257 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:02:59,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:02:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 317. [2021-06-05 22:02:59,260 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 22:02:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 952 transitions. [2021-06-05 22:02:59,261 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 952 transitions. Word has length 20 [2021-06-05 22:02:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:59,261 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 952 transitions. [2021-06-05 22:02:59,261 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 22:02:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 952 transitions. [2021-06-05 22:02:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:59,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:59,261 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:59,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:59,462 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:59,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1991909177, now seen corresponding path program 297 times [2021-06-05 22:02:59,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:59,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256929295] [2021-06-05 22:02:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:59,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:59,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256929295] [2021-06-05 22:02:59,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256929295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:59,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966912250] [2021-06-05 22:02:59,535 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 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 22:02:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:02:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:59,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966912250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:59,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:59,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:02:59,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826498155] [2021-06-05 22:02:59,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:02:59,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:02:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:02:59,753 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 22:03:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:00,020 INFO L93 Difference]: Finished difference Result 375 states and 1077 transitions. [2021-06-05 22:03:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:00,020 INFO L225 Difference]: With dead ends: 375 [2021-06-05 22:03:00,021 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:03:00,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:03:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 314. [2021-06-05 22:03:00,024 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 22:03:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-06-05 22:03:00,025 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-06-05 22:03:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:00,025 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-06-05 22:03:00,025 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 22:03:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-06-05 22:03:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:00,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:00,026 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:00,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2821 [2021-06-05 22:03:00,241 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1454053599, now seen corresponding path program 298 times [2021-06-05 22:03:00,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:00,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914431261] [2021-06-05 22:03:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:00,293 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 22:03:00,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:00,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914431261] [2021-06-05 22:03:00,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914431261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:00,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874497068] [2021-06-05 22:03:00,293 INFO L93 rtionOrderModulation]: Changing 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 22:03:00,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:00,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:00,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874497068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:00,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:00,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201533016] [2021-06-05 22:03:00,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:00,529 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 22:03:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:00,864 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-06-05 22:03:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:00,865 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 22:03:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:00,865 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:03:00,865 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:03:00,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:03:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2021-06-05 22:03:00,868 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 22:03:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 22:03:00,868 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 22:03:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:00,868 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 22:03:00,868 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 22:03:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 22:03:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:00,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:00,869 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:01,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2833,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:01,069 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1320575643, now seen corresponding path program 299 times [2021-06-05 22:03:01,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:01,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860119938] [2021-06-05 22:03:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:01,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860119938] [2021-06-05 22:03:01,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860119938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130297039] [2021-06-05 22:03:01,149 INFO L93 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 22:03:01,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130297039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:01,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:01,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:01,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038756000] [2021-06-05 22:03:01,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:01,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:01,401 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 22:03:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:01,635 INFO L93 Difference]: Finished difference Result 456 states and 1288 transitions. [2021-06-05 22:03:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:01,635 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 22:03:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:01,635 INFO L225 Difference]: With dead ends: 456 [2021-06-05 22:03:01,636 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 22:03:01,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 22:03:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 319. [2021-06-05 22:03:01,639 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 22:03:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 966 transitions. [2021-06-05 22:03:01,639 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 966 transitions. Word has length 20 [2021-06-05 22:03:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:01,639 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 966 transitions. [2021-06-05 22:03:01,639 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 22:03:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 966 transitions. [2021-06-05 22:03:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:01,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:01,640 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:01,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-06-05 22:03:01,840 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash -173332079, now seen corresponding path program 300 times [2021-06-05 22:03:01,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:01,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133208311] [2021-06-05 22:03:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:01,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:01,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133208311] [2021-06-05 22:03:01,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133208311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:01,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852604126] [2021-06-05 22:03:01,908 INFO L93 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 22:03:01,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:01,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:01,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852604126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:02,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:02,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561612631] [2021-06-05 22:03:02,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:02,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:02,139 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 22:03:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:02,359 INFO L93 Difference]: Finished difference Result 462 states and 1289 transitions. [2021-06-05 22:03:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:02,359 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 22:03:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:02,360 INFO L225 Difference]: With dead ends: 462 [2021-06-05 22:03:02,360 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 22:03:02,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 22:03:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-06-05 22:03:02,363 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 22:03:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 968 transitions. [2021-06-05 22:03:02,363 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 968 transitions. Word has length 20 [2021-06-05 22:03:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:02,363 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 968 transitions. [2021-06-05 22:03:02,363 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 22:03:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 968 transitions. [2021-06-05 22:03:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:02,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:02,364 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:02,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2856,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:02,564 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2071976081, now seen corresponding path program 301 times [2021-06-05 22:03:02,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:02,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130741546] [2021-06-05 22:03:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130741546] [2021-06-05 22:03:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130741546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587115571] [2021-06-05 22:03:02,636 INFO 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 22:03:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:02,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587115571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:02,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:02,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686070900] [2021-06-05 22:03:02,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:02,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:02,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:02,862 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 22:03:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:03,059 INFO L93 Difference]: Finished difference Result 424 states and 1209 transitions. [2021-06-05 22:03:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:03,060 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 22:03:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:03,060 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:03:03,060 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 22:03:03,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 22:03:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 315. [2021-06-05 22:03:03,063 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 22:03:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 950 transitions. [2021-06-05 22:03:03,064 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 950 transitions. Word has length 20 [2021-06-05 22:03:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:03,064 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 950 transitions. [2021-06-05 22:03:03,064 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 22:03:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 950 transitions. [2021-06-05 22:03:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:03,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:03,064 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:03,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-06-05 22:03:03,265 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash -930648815, now seen corresponding path program 302 times [2021-06-05 22:03:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:03,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660500937] [2021-06-05 22:03:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:03,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:03,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660500937] [2021-06-05 22:03:03,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660500937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:03,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302494375] [2021-06-05 22:03:03,336 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 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 22:03:03,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:03,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:03,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302494375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:03,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:03,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:03,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146085591] [2021-06-05 22:03:03,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:03,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:03,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:03,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:03,537 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 22:03:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:03,743 INFO L93 Difference]: Finished difference Result 387 states and 1127 transitions. [2021-06-05 22:03:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:03,743 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 22:03:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:03,744 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:03:03,744 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 22:03:03,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 22:03:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-06-05 22:03:03,747 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 22:03:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-06-05 22:03:03,747 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-06-05 22:03:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:03,747 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-06-05 22:03:03,747 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 22:03:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-06-05 22:03:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:03,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:03,748 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:03,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2885 [2021-06-05 22:03:03,948 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:03,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2092712609, now seen corresponding path program 303 times [2021-06-05 22:03:03,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:03,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973803384] [2021-06-05 22:03:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:04,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:04,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973803384] [2021-06-05 22:03:04,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973803384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688231015] [2021-06-05 22:03:04,026 INFO L93 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 22:03:04,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:04,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:04,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:04,257 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 22:03:04,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688231015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:04,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:04,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405795919] [2021-06-05 22:03:04,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:04,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:04,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:04,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:04,258 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 22:03:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:04,454 INFO L93 Difference]: Finished difference Result 424 states and 1201 transitions. [2021-06-05 22:03:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:04,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:04,454 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:03:04,454 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 22:03:04,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 22:03:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 322. [2021-06-05 22:03:04,458 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 22:03:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 962 transitions. [2021-06-05 22:03:04,458 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 962 transitions. Word has length 20 [2021-06-05 22:03:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:04,458 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 962 transitions. [2021-06-05 22:03:04,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 962 transitions. [2021-06-05 22:03:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:04,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:04,459 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:04,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2896 [2021-06-05 22:03:04,659 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:04,659 INFO L82 PathProgramCache]: Analyzing trace with hash 177288683, now seen corresponding path program 304 times [2021-06-05 22:03:04,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:04,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413696995] [2021-06-05 22:03:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:04,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413696995] [2021-06-05 22:03:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413696995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120952920] [2021-06-05 22:03:04,729 INFO L93 rtionOrderModulation]: Changing 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 22:03:04,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:04,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:04,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:04,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120952920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:04,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719400553] [2021-06-05 22:03:04,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:04,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:04,919 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 22:03:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:05,163 INFO L93 Difference]: Finished difference Result 401 states and 1162 transitions. [2021-06-05 22:03:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:05,163 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 22:03:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:05,164 INFO L225 Difference]: With dead ends: 401 [2021-06-05 22:03:05,164 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:03:05,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:03:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 311. [2021-06-05 22:03:05,167 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 22:03:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 22:03:05,167 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 22:03:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:05,167 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 22:03:05,167 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 22:03:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 22:03:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:05,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:05,168 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:05,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2904,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:05,368 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:05,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:05,368 INFO L82 PathProgramCache]: Analyzing trace with hash 73854993, now seen corresponding path program 305 times [2021-06-05 22:03:05,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:05,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81142946] [2021-06-05 22:03:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:05,422 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 22:03:05,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:05,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81142946] [2021-06-05 22:03:05,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81142946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:05,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894713998] [2021-06-05 22:03:05,423 INFO L93 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 22:03:05,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:05,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:05,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:05,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894713998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:05,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:05,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:05,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37446151] [2021-06-05 22:03:05,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:05,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:05,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:05,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:05,634 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 22:03:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:05,897 INFO L93 Difference]: Finished difference Result 341 states and 999 transitions. [2021-06-05 22:03:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:05,897 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 22:03:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:05,898 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:03:05,898 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:03:05,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:03:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2021-06-05 22:03:05,901 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 22:03:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-06-05 22:03:05,901 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 20 [2021-06-05 22:03:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:05,901 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-06-05 22:03:05,901 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 22:03:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-06-05 22:03:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:05,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:05,902 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:06,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:06,102 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash 825255431, now seen corresponding path program 306 times [2021-06-05 22:03:06,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:06,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205579619] [2021-06-05 22:03:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:06,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205579619] [2021-06-05 22:03:06,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205579619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111163972] [2021-06-05 22:03:06,156 INFO L93 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 22:03:06,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:06,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:06,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:06,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111163972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:06,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:06,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:06,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305369565] [2021-06-05 22:03:06,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:06,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:06,367 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 22:03:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:06,652 INFO L93 Difference]: Finished difference Result 366 states and 1051 transitions. [2021-06-05 22:03:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:06,652 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 22:03:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:06,653 INFO L225 Difference]: With dead ends: 366 [2021-06-05 22:03:06,653 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 22:03:06,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 22:03:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 323. [2021-06-05 22:03:06,656 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 22:03:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-06-05 22:03:06,656 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 20 [2021-06-05 22:03:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:06,656 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-06-05 22:03:06,656 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 22:03:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-06-05 22:03:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:06,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:06,657 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:06,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2922 [2021-06-05 22:03:06,857 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1090168495, now seen corresponding path program 307 times [2021-06-05 22:03:06,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:06,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873380996] [2021-06-05 22:03:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:06,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:06,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873380996] [2021-06-05 22:03:06,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873380996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:06,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074098727] [2021-06-05 22:03:06,915 INFO 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 22:03:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:07,171 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 22:03:07,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074098727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:07,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:07,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:07,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844381458] [2021-06-05 22:03:07,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:07,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:07,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:07,173 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 22:03:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:07,432 INFO L93 Difference]: Finished difference Result 337 states and 997 transitions. [2021-06-05 22:03:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:07,432 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 22:03:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:07,432 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:03:07,432 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 22:03:07,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 22:03:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 310. [2021-06-05 22:03:07,435 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 22:03:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-06-05 22:03:07,435 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-06-05 22:03:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:07,436 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-06-05 22:03:07,436 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 22:03:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-06-05 22:03:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:07,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:07,436 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:07,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:07,636 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 259797553, now seen corresponding path program 308 times [2021-06-05 22:03:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:07,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094281289] [2021-06-05 22:03:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:07,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:07,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094281289] [2021-06-05 22:03:07,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094281289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:07,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586982530] [2021-06-05 22:03:07,705 INFO L93 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 22:03:07,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:07,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:07,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:07,878 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 22:03:07,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586982530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:07,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:07,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:07,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587745508] [2021-06-05 22:03:07,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:07,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:07,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:07,879 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 22:03:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:08,022 INFO L93 Difference]: Finished difference Result 414 states and 1199 transitions. [2021-06-05 22:03:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:08,022 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 22:03:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:08,023 INFO L225 Difference]: With dead ends: 414 [2021-06-05 22:03:08,023 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:03:08,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:03:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 320. [2021-06-05 22:03:08,026 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 22:03:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 970 transitions. [2021-06-05 22:03:08,026 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 970 transitions. Word has length 20 [2021-06-05 22:03:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:08,026 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 970 transitions. [2021-06-05 22:03:08,026 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 22:03:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 970 transitions. [2021-06-05 22:03:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:08,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:08,027 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:08,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:08,227 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1234110169, now seen corresponding path program 309 times [2021-06-05 22:03:08,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:08,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936381482] [2021-06-05 22:03:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:08,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:08,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936381482] [2021-06-05 22:03:08,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936381482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:08,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869110894] [2021-06-05 22:03:08,292 INFO L93 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 22:03:08,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:08,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:08,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:08,497 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 22:03:08,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869110894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:08,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:08,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:08,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130100259] [2021-06-05 22:03:08,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:08,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:08,497 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 22:03:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:08,679 INFO L93 Difference]: Finished difference Result 420 states and 1200 transitions. [2021-06-05 22:03:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:08,679 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 22:03:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:08,680 INFO L225 Difference]: With dead ends: 420 [2021-06-05 22:03:08,680 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:03:08,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:03:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-06-05 22:03:08,683 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 22:03:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 22:03:08,683 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 22:03:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:08,683 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 22:03:08,683 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 22:03:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 22:03:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:08,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:08,684 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:08,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-06-05 22:03:08,884 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:08,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1011197991, now seen corresponding path program 310 times [2021-06-05 22:03:08,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:08,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306221025] [2021-06-05 22:03:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:08,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:08,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306221025] [2021-06-05 22:03:08,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306221025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020489470] [2021-06-05 22:03:08,946 INFO L93 rtionOrderModulation]: Changing 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 22:03:09,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:09,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020489470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:09,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:09,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792808703] [2021-06-05 22:03:09,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:09,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:09,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:09,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:09,140 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 22:03:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:09,353 INFO L93 Difference]: Finished difference Result 472 states and 1342 transitions. [2021-06-05 22:03:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:09,353 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 22:03:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:09,354 INFO L225 Difference]: With dead ends: 472 [2021-06-05 22:03:09,354 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 22:03:09,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 22:03:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 326. [2021-06-05 22:03:09,357 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 22:03:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 987 transitions. [2021-06-05 22:03:09,358 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 987 transitions. Word has length 20 [2021-06-05 22:03:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:09,358 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 987 transitions. [2021-06-05 22:03:09,358 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 22:03:09,358 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 987 transitions. [2021-06-05 22:03:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:09,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:09,358 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:09,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-06-05 22:03:09,559 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1991426905, now seen corresponding path program 311 times [2021-06-05 22:03:09,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:09,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074691756] [2021-06-05 22:03:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:09,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074691756] [2021-06-05 22:03:09,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074691756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292444584] [2021-06-05 22:03:09,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:09,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:09,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292444584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:09,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:09,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884919719] [2021-06-05 22:03:09,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:09,831 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 22:03:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:10,065 INFO L93 Difference]: Finished difference Result 435 states and 1260 transitions. [2021-06-05 22:03:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:10,065 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 22:03:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:10,066 INFO L225 Difference]: With dead ends: 435 [2021-06-05 22:03:10,066 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 22:03:10,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 22:03:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 323. [2021-06-05 22:03:10,069 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 22:03:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 22:03:10,069 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 22:03:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:10,070 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 22:03:10,070 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 22:03:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 22:03:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:10,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:10,070 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:10,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2971 [2021-06-05 22:03:10,270 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:10,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1031934519, now seen corresponding path program 312 times [2021-06-05 22:03:10,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:10,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958227107] [2021-06-05 22:03:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:10,334 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 22:03:10,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:10,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958227107] [2021-06-05 22:03:10,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958227107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:10,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349810923] [2021-06-05 22:03:10,334 INFO L93 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 22:03:10,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:10,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:10,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:10,530 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 22:03:10,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349810923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:10,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:10,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:10,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314457470] [2021-06-05 22:03:10,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:10,530 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 22:03:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:10,768 INFO L93 Difference]: Finished difference Result 460 states and 1294 transitions. [2021-06-05 22:03:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:10,769 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 22:03:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:10,769 INFO L225 Difference]: With dead ends: 460 [2021-06-05 22:03:10,769 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 22:03:10,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 22:03:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 327. [2021-06-05 22:03:10,773 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 22:03:10,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 986 transitions. [2021-06-05 22:03:10,773 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 986 transitions. Word has length 20 [2021-06-05 22:03:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:10,773 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 986 transitions. [2021-06-05 22:03:10,773 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 22:03:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 986 transitions. [2021-06-05 22:03:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:10,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:10,774 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:10,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-05 22:03:10,974 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -883489407, now seen corresponding path program 313 times [2021-06-05 22:03:10,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:10,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810172974] [2021-06-05 22:03:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:11,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810172974] [2021-06-05 22:03:11,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810172974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942696874] [2021-06-05 22:03:11,035 INFO 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 22:03:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:11,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:11,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942696874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:11,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:11,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486195607] [2021-06-05 22:03:11,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:11,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:11,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:11,241 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 22:03:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:11,495 INFO L93 Difference]: Finished difference Result 443 states and 1276 transitions. [2021-06-05 22:03:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:11,496 INFO L225 Difference]: With dead ends: 443 [2021-06-05 22:03:11,496 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 22:03:11,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 22:03:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 324. [2021-06-05 22:03:11,499 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 22:03:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 976 transitions. [2021-06-05 22:03:11,499 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 976 transitions. Word has length 20 [2021-06-05 22:03:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:11,500 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 976 transitions. [2021-06-05 22:03:11,500 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 22:03:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 976 transitions. [2021-06-05 22:03:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:11,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:11,500 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:11,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-06-05 22:03:11,700 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1101230639, now seen corresponding path program 314 times [2021-06-05 22:03:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:11,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705647474] [2021-06-05 22:03:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:11,768 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 22:03:11,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705647474] [2021-06-05 22:03:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705647474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32100328] [2021-06-05 22:03:11,768 INFO L93 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 22:03:11,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:11,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:11,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32100328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:11,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:11,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:11,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622729447] [2021-06-05 22:03:11,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:11,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:11,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:11,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:11,964 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 22:03:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:12,115 INFO L93 Difference]: Finished difference Result 396 states and 1160 transitions. [2021-06-05 22:03:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:12,115 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 22:03:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:12,116 INFO L225 Difference]: With dead ends: 396 [2021-06-05 22:03:12,116 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:03:12,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:03:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 325. [2021-06-05 22:03:12,118 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 22:03:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-06-05 22:03:12,119 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-06-05 22:03:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:12,119 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-06-05 22:03:12,119 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 22:03:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-06-05 22:03:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:12,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:12,119 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:12,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:12,320 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:12,320 INFO L82 PathProgramCache]: Analyzing trace with hash 191111761, now seen corresponding path program 315 times [2021-06-05 22:03:12,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:12,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543032502] [2021-06-05 22:03:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:12,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:12,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543032502] [2021-06-05 22:03:12,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543032502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:12,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832719313] [2021-06-05 22:03:12,383 INFO L93 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 22:03:12,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:12,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:12,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832719313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:12,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:12,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:12,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21543838] [2021-06-05 22:03:12,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:12,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:12,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:12,581 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 22:03:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:12,757 INFO L93 Difference]: Finished difference Result 384 states and 1127 transitions. [2021-06-05 22:03:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:12,757 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 22:03:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:12,757 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:03:12,757 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 22:03:12,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 22:03:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-06-05 22:03:12,760 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 22:03:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-06-05 22:03:12,761 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-06-05 22:03:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:12,761 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-06-05 22:03:12,761 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 22:03:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-06-05 22:03:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:12,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:12,761 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:12,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3009,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:12,962 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1704753275, now seen corresponding path program 316 times [2021-06-05 22:03:12,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:12,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274817236] [2021-06-05 22:03:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:13,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274817236] [2021-06-05 22:03:13,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274817236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990735213] [2021-06-05 22:03:13,019 INFO L93 rtionOrderModulation]: Changing 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 22:03:13,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:13,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:13,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:13,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990735213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:13,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:13,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472322873] [2021-06-05 22:03:13,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:13,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:13,196 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 22:03:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:13,358 INFO L93 Difference]: Finished difference Result 339 states and 1005 transitions. [2021-06-05 22:03:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:13,358 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 22:03:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:13,359 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:03:13,359 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:03:13,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:03:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 311. [2021-06-05 22:03:13,362 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 22:03:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 929 transitions. [2021-06-05 22:03:13,362 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 929 transitions. Word has length 20 [2021-06-05 22:03:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:13,362 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 929 transitions. [2021-06-05 22:03:13,362 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 22:03:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 929 transitions. [2021-06-05 22:03:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:13,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:13,363 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:13,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 22:03:13,563 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:13,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1947016007, now seen corresponding path program 317 times [2021-06-05 22:03:13,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:13,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934009541] [2021-06-05 22:03:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:13,619 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 22:03:13,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:13,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934009541] [2021-06-05 22:03:13,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934009541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068306730] [2021-06-05 22:03:13,619 INFO L93 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 22:03:13,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:13,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068306730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:13,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:13,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799657750] [2021-06-05 22:03:13,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:13,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:13,813 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 22:03:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:13,958 INFO L93 Difference]: Finished difference Result 384 states and 1099 transitions. [2021-06-05 22:03:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:13,959 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:03:13,959 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:03:13,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:13,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:03:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2021-06-05 22:03:13,962 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 22:03:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 968 transitions. [2021-06-05 22:03:13,962 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 968 transitions. Word has length 20 [2021-06-05 22:03:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:13,962 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 968 transitions. [2021-06-05 22:03:13,962 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 22:03:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 968 transitions. [2021-06-05 22:03:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:13,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:13,963 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:14,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:14,163 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash 31592081, now seen corresponding path program 318 times [2021-06-05 22:03:14,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:14,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481294645] [2021-06-05 22:03:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:14,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:14,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481294645] [2021-06-05 22:03:14,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481294645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:14,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20041218] [2021-06-05 22:03:14,221 INFO L93 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 22:03:14,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:14,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:14,394 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 22:03:14,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20041218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:14,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:14,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:14,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887655981] [2021-06-05 22:03:14,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:14,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:14,395 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 22:03:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:14,570 INFO L93 Difference]: Finished difference Result 390 states and 1120 transitions. [2021-06-05 22:03:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:14,570 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 22:03:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:14,570 INFO L225 Difference]: With dead ends: 390 [2021-06-05 22:03:14,570 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 22:03:14,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 22:03:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 323. [2021-06-05 22:03:14,573 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 22:03:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-06-05 22:03:14,574 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 20 [2021-06-05 22:03:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:14,574 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-06-05 22:03:14,574 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 22:03:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-06-05 22:03:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:14,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:14,574 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:14,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:14,775 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:14,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1071827879, now seen corresponding path program 319 times [2021-06-05 22:03:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:14,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769964759] [2021-06-05 22:03:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:14,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:14,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769964759] [2021-06-05 22:03:14,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769964759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:14,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108932317] [2021-06-05 22:03:14,833 INFO 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 22:03:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:15,042 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 22:03:15,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108932317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:15,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:15,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:15,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120465551] [2021-06-05 22:03:15,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:15,043 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 22:03:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:15,206 INFO L93 Difference]: Finished difference Result 359 states and 1055 transitions. [2021-06-05 22:03:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:15,206 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 22:03:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:15,207 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:03:15,207 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:03:15,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:03:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 310. [2021-06-05 22:03:15,210 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 22:03:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-06-05 22:03:15,210 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-06-05 22:03:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:15,210 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-06-05 22:03:15,210 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 22:03:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-06-05 22:03:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:15,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:15,211 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:15,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:15,411 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:15,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1623389951, now seen corresponding path program 320 times [2021-06-05 22:03:15,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:15,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951093802] [2021-06-05 22:03:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:15,458 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 22:03:15,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:15,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951093802] [2021-06-05 22:03:15,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951093802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:15,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226917183] [2021-06-05 22:03:15,459 INFO L93 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 22:03:15,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:15,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:15,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:15,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226917183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:15,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:15,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:15,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309883182] [2021-06-05 22:03:15,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:15,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:15,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:15,648 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 22:03:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:15,798 INFO L93 Difference]: Finished difference Result 329 states and 966 transitions. [2021-06-05 22:03:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:15,798 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 22:03:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:15,799 INFO L225 Difference]: With dead ends: 329 [2021-06-05 22:03:15,799 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:03:15,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:03:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2021-06-05 22:03:15,801 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 22:03:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 935 transitions. [2021-06-05 22:03:15,802 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 935 transitions. Word has length 20 [2021-06-05 22:03:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:15,802 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 935 transitions. [2021-06-05 22:03:15,802 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 22:03:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 935 transitions. [2021-06-05 22:03:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:15,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:15,802 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:16,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 22:03:16,003 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:16,003 INFO L82 PathProgramCache]: Analyzing trace with hash -871989513, now seen corresponding path program 321 times [2021-06-05 22:03:16,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:16,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386473341] [2021-06-05 22:03:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:16,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:16,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386473341] [2021-06-05 22:03:16,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386473341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34825915] [2021-06-05 22:03:16,060 INFO L93 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 22:03:16,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:16,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34825915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:16,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028706840] [2021-06-05 22:03:16,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:16,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:16,226 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 22:03:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:16,385 INFO L93 Difference]: Finished difference Result 354 states and 1018 transitions. [2021-06-05 22:03:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:16,385 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 22:03:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:16,386 INFO L225 Difference]: With dead ends: 354 [2021-06-05 22:03:16,386 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:03:16,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:03:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 324. [2021-06-05 22:03:16,389 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 22:03:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 962 transitions. [2021-06-05 22:03:16,389 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 962 transitions. Word has length 20 [2021-06-05 22:03:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:16,389 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 962 transitions. [2021-06-05 22:03:16,389 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 22:03:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 962 transitions. [2021-06-05 22:03:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:16,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:16,390 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:16,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 22:03:16,590 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1507553857, now seen corresponding path program 322 times [2021-06-05 22:03:16,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:16,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244037840] [2021-06-05 22:03:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:16,641 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 22:03:16,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:16,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244037840] [2021-06-05 22:03:16,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244037840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560486908] [2021-06-05 22:03:16,642 INFO L93 rtionOrderModulation]: Changing 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 22:03:16,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:16,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:16,805 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 22:03:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560486908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:16,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:16,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088211865] [2021-06-05 22:03:16,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:16,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:16,806 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 22:03:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:16,924 INFO L93 Difference]: Finished difference Result 325 states and 964 transitions. [2021-06-05 22:03:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:16,924 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 22:03:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:16,924 INFO L225 Difference]: With dead ends: 325 [2021-06-05 22:03:16,924 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 22:03:16,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 22:03:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 312. [2021-06-05 22:03:16,927 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 22:03:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 930 transitions. [2021-06-05 22:03:16,927 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 930 transitions. Word has length 20 [2021-06-05 22:03:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:16,928 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 930 transitions. [2021-06-05 22:03:16,928 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 22:03:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 930 transitions. [2021-06-05 22:03:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:16,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:16,928 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:17,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:17,128 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1310549153, now seen corresponding path program 323 times [2021-06-05 22:03:17,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:17,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169708770] [2021-06-05 22:03:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:17,178 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 22:03:17,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:17,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169708770] [2021-06-05 22:03:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169708770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45380208] [2021-06-05 22:03:17,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:17,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:17,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:17,335 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 22:03:17,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45380208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:17,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347447207] [2021-06-05 22:03:17,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:17,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:17,336 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 22:03:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:17,474 INFO L93 Difference]: Finished difference Result 360 states and 1033 transitions. [2021-06-05 22:03:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:17,474 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 22:03:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:17,475 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:03:17,475 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:03:17,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:03:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 326. [2021-06-05 22:03:17,478 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 22:03:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-05 22:03:17,478 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-05 22:03:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:17,478 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-05 22:03:17,478 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 22:03:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-05 22:03:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:17,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:17,479 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:17,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-06-05 22:03:17,679 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:17,679 INFO L82 PathProgramCache]: Analyzing trace with hash -604874773, now seen corresponding path program 324 times [2021-06-05 22:03:17,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:17,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79177129] [2021-06-05 22:03:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:17,731 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 22:03:17,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79177129] [2021-06-05 22:03:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79177129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103716264] [2021-06-05 22:03:17,731 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 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 22:03:17,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:17,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:17,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103716264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:17,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453408316] [2021-06-05 22:03:17,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:17,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:17,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:17,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:17,884 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 22:03:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:18,041 INFO L93 Difference]: Finished difference Result 360 states and 1039 transitions. [2021-06-05 22:03:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:18,042 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 22:03:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:18,042 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:03:18,042 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 22:03:18,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 22:03:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 324. [2021-06-05 22:03:18,045 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 22:03:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 964 transitions. [2021-06-05 22:03:18,045 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 964 transitions. Word has length 20 [2021-06-05 22:03:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:18,046 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 964 transitions. [2021-06-05 22:03:18,046 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 22:03:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 964 transitions. [2021-06-05 22:03:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:18,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:18,046 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:18,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 22:03:18,246 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 435361025, now seen corresponding path program 325 times [2021-06-05 22:03:18,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:18,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867705447] [2021-06-05 22:03:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:18,306 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 22:03:18,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867705447] [2021-06-05 22:03:18,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867705447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161229410] [2021-06-05 22:03:18,307 INFO 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 22:03:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:18,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:18,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161229410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:18,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:18,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530966684] [2021-06-05 22:03:18,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:18,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:18,455 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 22:03:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:18,582 INFO L93 Difference]: Finished difference Result 335 states and 989 transitions. [2021-06-05 22:03:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:18,582 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 22:03:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:18,582 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:03:18,582 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 22:03:18,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 22:03:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 307. [2021-06-05 22:03:18,585 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 22:03:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 915 transitions. [2021-06-05 22:03:18,586 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 915 transitions. Word has length 20 [2021-06-05 22:03:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:18,586 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 915 transitions. [2021-06-05 22:03:18,586 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 22:03:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 915 transitions. [2021-06-05 22:03:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:18,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:18,586 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:18,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:18,786 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash 2107033044, now seen corresponding path program 326 times [2021-06-05 22:03:18,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:18,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467606159] [2021-06-05 22:03:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:18,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467606159] [2021-06-05 22:03:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467606159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437882855] [2021-06-05 22:03:18,842 INFO L93 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 22:03:18,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:18,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:18,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,035 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-06-05 22:03:19,038 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 22:03:19,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,041 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 12 treesize of output 8 [2021-06-05 22:03:19,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,060 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:19,060 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:03:19,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:19,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 22:03:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:19,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437882855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:19,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:19,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 22:03:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045478393] [2021-06-05 22:03:19,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:19,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:19,125 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 22:03:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:19,582 INFO L93 Difference]: Finished difference Result 377 states and 1078 transitions. [2021-06-05 22:03:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:19,582 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 22:03:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:19,583 INFO L225 Difference]: With dead ends: 377 [2021-06-05 22:03:19,583 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 22:03:19,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 22:03:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2021-06-05 22:03:19,585 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 22:03:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-06-05 22:03:19,585 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-06-05 22:03:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:19,586 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-06-05 22:03:19,586 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 22:03:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-06-05 22:03:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:19,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:19,586 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:19,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 22:03:19,786 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:19,787 INFO L82 PathProgramCache]: Analyzing trace with hash 6577655, now seen corresponding path program 327 times [2021-06-05 22:03:19,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:19,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146546803] [2021-06-05 22:03:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:19,840 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 22:03:19,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:19,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146546803] [2021-06-05 22:03:19,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146546803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:19,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508483650] [2021-06-05 22:03:19,840 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 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 22:03:19,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:19,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:19,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,995 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-05 22:03:19,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:03:19,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,017 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-05 22:03:20,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-06-05 22:03:20,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:20,018 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:03:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:20,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508483650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:20,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:20,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:20,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753573446] [2021-06-05 22:03:20,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:20,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:20,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:20,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:20,058 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 22:03:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:20,282 INFO L93 Difference]: Finished difference Result 438 states and 1259 transitions. [2021-06-05 22:03:20,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:20,282 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 22:03:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:20,282 INFO L225 Difference]: With dead ends: 438 [2021-06-05 22:03:20,282 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 22:03:20,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 22:03:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 298. [2021-06-05 22:03:20,285 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 22:03:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 22:03:20,286 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 22:03:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:20,286 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 22:03:20,286 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 22:03:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 22:03:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:20,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:20,286 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:20,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-06-05 22:03:20,487 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:20,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1165221185, now seen corresponding path program 328 times [2021-06-05 22:03:20,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:20,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781211796] [2021-06-05 22:03:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:20,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781211796] [2021-06-05 22:03:20,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781211796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963851300] [2021-06-05 22:03:20,546 INFO L93 rtionOrderModulation]: Changing 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 22:03:20,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:20,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:20,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,705 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:03:20,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:20,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,709 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 12 treesize of output 8 [2021-06-05 22:03:20,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,728 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:20,728 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:03:20,728 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-06-05 22:03:20,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:20,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:03:20,774 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 22:03:20,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963851300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:20,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:20,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:20,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305469659] [2021-06-05 22:03:20,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:20,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:20,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:20,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:20,775 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 22:03:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:21,123 INFO L93 Difference]: Finished difference Result 490 states and 1380 transitions. [2021-06-05 22:03:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:21,123 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 22:03:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:21,123 INFO L225 Difference]: With dead ends: 490 [2021-06-05 22:03:21,123 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 22:03:21,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 22:03:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-06-05 22:03:21,126 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 22:03:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 22:03:21,127 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 22:03:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:21,127 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 22:03:21,127 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 22:03:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 22:03:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:21,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:21,127 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-06-05 22:03:21,328 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash -328686537, now seen corresponding path program 329 times [2021-06-05 22:03:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:21,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449145045] [2021-06-05 22:03:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:21,381 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 22:03:21,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449145045] [2021-06-05 22:03:21,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449145045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482187239] [2021-06-05 22:03:21,381 INFO L93 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 22:03:21,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:21,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:21,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:03:21,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:21,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,561 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:03:21,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:21,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,565 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 13 treesize of output 9 [2021-06-05 22:03:21,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,585 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:21,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:21,585 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:03:21,628 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 22:03:21,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482187239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:21,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:21,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469544588] [2021-06-05 22:03:21,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:21,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:21,629 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 22:03:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:21,843 INFO L93 Difference]: Finished difference Result 447 states and 1271 transitions. [2021-06-05 22:03:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:21,843 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 22:03:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:21,844 INFO L225 Difference]: With dead ends: 447 [2021-06-05 22:03:21,844 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 22:03:21,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 22:03:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 302. [2021-06-05 22:03:21,846 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 22:03:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 22:03:21,847 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 22:03:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:21,847 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 22:03:21,847 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 22:03:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 22:03:21,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:21,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:21,847 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:22,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-06-05 22:03:22,048 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1825154753, now seen corresponding path program 330 times [2021-06-05 22:03:22,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:22,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062081106] [2021-06-05 22:03:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:22,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062081106] [2021-06-05 22:03:22,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062081106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255336989] [2021-06-05 22:03:22,103 INFO L93 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 22:03:22,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:22,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:22,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:22,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:22,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:22,232 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 6 treesize of output 4 [2021-06-05 22:03:22,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:22,255 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:03:22,257 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 12 treesize of output 8 [2021-06-05 22:03:22,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:22,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:22,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:22,267 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:03:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255336989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:22,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:22,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553574553] [2021-06-05 22:03:22,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:22,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:22,319 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 22:03:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:22,593 INFO L93 Difference]: Finished difference Result 550 states and 1569 transitions. [2021-06-05 22:03:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:22,594 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 22:03:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:22,594 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:03:22,594 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 22:03:22,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 22:03:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 308. [2021-06-05 22:03:22,598 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 22:03:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 923 transitions. [2021-06-05 22:03:22,598 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 923 transitions. Word has length 20 [2021-06-05 22:03:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:22,598 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 923 transitions. [2021-06-05 22:03:22,598 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 22:03:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 923 transitions. [2021-06-05 22:03:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:22,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:22,599 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:22,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-06-05 22:03:22,799 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash -836761151, now seen corresponding path program 331 times [2021-06-05 22:03:22,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:22,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777445368] [2021-06-05 22:03:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:22,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777445368] [2021-06-05 22:03:22,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777445368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729945488] [2021-06-05 22:03:22,857 INFO 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 22:03:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:22,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:22,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:03:22,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:23,002 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 22:03:23,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,034 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:03:23,037 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 12 treesize of output 8 [2021-06-05 22:03:23,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:23,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,058 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:23,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:23,059 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:03:23,108 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 22:03:23,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729945488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:23,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:23,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484414293] [2021-06-05 22:03:23,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:23,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:23,109 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 22:03:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:23,313 INFO L93 Difference]: Finished difference Result 517 states and 1487 transitions. [2021-06-05 22:03:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:23,314 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 22:03:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:23,314 INFO L225 Difference]: With dead ends: 517 [2021-06-05 22:03:23,314 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 22:03:23,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 22:03:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-06-05 22:03:23,318 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 22:03:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 938 transitions. [2021-06-05 22:03:23,318 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 938 transitions. Word has length 20 [2021-06-05 22:03:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:23,318 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 938 transitions. [2021-06-05 22:03:23,318 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 22:03:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 938 transitions. [2021-06-05 22:03:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:23,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:23,319 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:23,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:23,519 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1501069189, now seen corresponding path program 332 times [2021-06-05 22:03:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:23,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422109182] [2021-06-05 22:03:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:23,576 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 22:03:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422109182] [2021-06-05 22:03:23,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422109182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941375539] [2021-06-05 22:03:23,576 INFO L93 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 22:03:23,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:23,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:23,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:23,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:23,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,739 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 22:03:23,739 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:03:23,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:23,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:23,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:23,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:23,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,785 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:03:23,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:23,785 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 22:03:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:23,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941375539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:23,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:23,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606130903] [2021-06-05 22:03:23,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:23,833 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 22:03:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:24,048 INFO L93 Difference]: Finished difference Result 484 states and 1410 transitions. [2021-06-05 22:03:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:24,048 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 22:03:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:24,049 INFO L225 Difference]: With dead ends: 484 [2021-06-05 22:03:24,049 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 22:03:24,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 22:03:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 302. [2021-06-05 22:03:24,053 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 22:03:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 22:03:24,054 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 22:03:24,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:24,054 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 22:03:24,054 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 22:03:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 22:03:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:24,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:24,055 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:24,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-06-05 22:03:24,255 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1504948017, now seen corresponding path program 333 times [2021-06-05 22:03:24,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:24,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325729959] [2021-06-05 22:03:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:24,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325729959] [2021-06-05 22:03:24,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325729959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156904173] [2021-06-05 22:03:24,327 INFO L93 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 22:03:24,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:24,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:24,461 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 6 treesize of output 4 [2021-06-05 22:03:24,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:24,493 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 22:03:24,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:24,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:24,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:24,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:24,517 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:24,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_128 vanished before elimination [2021-06-05 22:03:24,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:24,518 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:03:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156904173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:24,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:24,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109992354] [2021-06-05 22:03:24,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:24,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:24,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:24,595 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 22:03:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:24,988 INFO L93 Difference]: Finished difference Result 615 states and 1694 transitions. [2021-06-05 22:03:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:24,989 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 22:03:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:24,989 INFO L225 Difference]: With dead ends: 615 [2021-06-05 22:03:24,989 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 22:03:24,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 22:03:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 310. [2021-06-05 22:03:24,993 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 22:03:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 935 transitions. [2021-06-05 22:03:24,993 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 935 transitions. Word has length 20 [2021-06-05 22:03:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:24,994 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 935 transitions. [2021-06-05 22:03:24,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 935 transitions. [2021-06-05 22:03:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:24,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:24,994 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:25,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:25,194 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:25,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1296111557, now seen corresponding path program 334 times [2021-06-05 22:03:25,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:25,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365552643] [2021-06-05 22:03:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:25,253 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 22:03:25,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:25,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365552643] [2021-06-05 22:03:25,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365552643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:25,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967321726] [2021-06-05 22:03:25,254 INFO L93 rtionOrderModulation]: Changing 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 22:03:25,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:25,382 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 6 treesize of output 4 [2021-06-05 22:03:25,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:25,431 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 22:03:25,433 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 6 treesize of output 4 [2021-06-05 22:03:25,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:25,465 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:03:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:25,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:25,470 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 13 treesize of output 9 [2021-06-05 22:03:25,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:25,489 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:25,489 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:03:25,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:25,490 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:03:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:25,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967321726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:25,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:25,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976135319] [2021-06-05 22:03:25,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:25,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:25,566 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 22:03:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:25,811 INFO L93 Difference]: Finished difference Result 549 states and 1540 transitions. [2021-06-05 22:03:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:25,811 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 22:03:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:25,812 INFO L225 Difference]: With dead ends: 549 [2021-06-05 22:03:25,812 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 22:03:25,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 22:03:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-06-05 22:03:25,815 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 22:03:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 22:03:25,816 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 22:03:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:25,816 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 22:03:25,816 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 22:03:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 22:03:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:25,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:25,816 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:26,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-06-05 22:03:26,017 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash -753547579, now seen corresponding path program 335 times [2021-06-05 22:03:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:26,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705983460] [2021-06-05 22:03:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:26,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705983460] [2021-06-05 22:03:26,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705983460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798245597] [2021-06-05 22:03:26,080 INFO L93 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 22:03:26,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:26,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:26,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:26,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:26,207 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 6 treesize of output 4 [2021-06-05 22:03:26,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,249 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 22:03:26,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:26,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,283 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:03:26,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:26,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:26,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,306 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:26,307 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:03:26,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:26,307 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:03:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798245597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:26,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:26,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136833990] [2021-06-05 22:03:26,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:26,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:26,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:26,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:26,391 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 22:03:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:26,666 INFO L93 Difference]: Finished difference Result 574 states and 1629 transitions. [2021-06-05 22:03:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:26,666 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 22:03:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:26,667 INFO L225 Difference]: With dead ends: 574 [2021-06-05 22:03:26,667 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 22:03:26,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 22:03:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 307. [2021-06-05 22:03:26,671 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 22:03:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 925 transitions. [2021-06-05 22:03:26,671 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 925 transitions. Word has length 20 [2021-06-05 22:03:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:26,671 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 925 transitions. [2021-06-05 22:03:26,671 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 22:03:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 925 transitions. [2021-06-05 22:03:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:26,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:26,671 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:26,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 22:03:26,872 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:26,872 INFO L82 PathProgramCache]: Analyzing trace with hash 538794821, now seen corresponding path program 336 times [2021-06-05 22:03:26,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:26,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794623667] [2021-06-05 22:03:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:26,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794623667] [2021-06-05 22:03:26,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794623667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293273934] [2021-06-05 22:03:26,940 INFO L93 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 22:03:27,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:27,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:27,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,106 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 22:03:27,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:27,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:27,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,132 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:03:27,132 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 22:03:27,132 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-06-05 22:03:27,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:27,133 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:03:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:27,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293273934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:27,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932686529] [2021-06-05 22:03:27,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:27,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:27,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:27,214 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 22:03:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:27,454 INFO L93 Difference]: Finished difference Result 543 states and 1562 transitions. [2021-06-05 22:03:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:27,454 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 22:03:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:27,455 INFO L225 Difference]: With dead ends: 543 [2021-06-05 22:03:27,455 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 22:03:27,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 22:03:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-06-05 22:03:27,458 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 22:03:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 22:03:27,459 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 22:03:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:27,459 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 22:03:27,459 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 22:03:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 22:03:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:27,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:27,459 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:27,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-06-05 22:03:27,660 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash -732811051, now seen corresponding path program 337 times [2021-06-05 22:03:27,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:27,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471974339] [2021-06-05 22:03:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:27,719 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 22:03:27,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:27,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471974339] [2021-06-05 22:03:27,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471974339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917654982] [2021-06-05 22:03:27,719 INFO 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 22:03:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:27,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:03:27,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:27,864 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 13 treesize of output 9 [2021-06-05 22:03:27,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:27,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,887 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:03:27,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:27,888 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:03:27,967 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 22:03:27,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917654982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:27,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:27,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118651135] [2021-06-05 22:03:27,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:27,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:27,968 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 22:03:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:28,184 INFO L93 Difference]: Finished difference Result 497 states and 1409 transitions. [2021-06-05 22:03:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:28,184 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 22:03:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:28,185 INFO L225 Difference]: With dead ends: 497 [2021-06-05 22:03:28,185 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 22:03:28,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 22:03:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 308. [2021-06-05 22:03:28,188 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 22:03:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-06-05 22:03:28,189 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-06-05 22:03:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:28,189 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-06-05 22:03:28,189 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 22:03:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-06-05 22:03:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:28,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:28,189 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:28,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3206 [2021-06-05 22:03:28,390 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1646732319, now seen corresponding path program 338 times [2021-06-05 22:03:28,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:28,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701060409] [2021-06-05 22:03:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:28,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:28,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701060409] [2021-06-05 22:03:28,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701060409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:28,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68649328] [2021-06-05 22:03:28,456 INFO L93 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 22:03:28,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:28,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:28,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:28,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:28,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:28,626 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 22:03:28,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:03:28,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:28,661 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:03:28,661 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 22:03:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:28,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:28,665 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 13 treesize of output 9 [2021-06-05 22:03:28,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:28,685 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:03:28,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:28,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:03:28,761 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 22:03:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68649328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:28,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:28,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:28,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105350091] [2021-06-05 22:03:28,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:28,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:28,762 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 22:03:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:29,053 INFO L93 Difference]: Finished difference Result 503 states and 1430 transitions. [2021-06-05 22:03:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:29,054 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 22:03:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:29,054 INFO L225 Difference]: With dead ends: 503 [2021-06-05 22:03:29,054 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 22:03:29,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 22:03:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 303. [2021-06-05 22:03:29,057 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 22:03:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-06-05 22:03:29,058 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-06-05 22:03:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:29,058 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-06-05 22:03:29,058 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 22:03:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-06-05 22:03:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:29,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:29,058 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:29,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3216,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:29,259 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash 764376663, now seen corresponding path program 339 times [2021-06-05 22:03:29,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:29,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37926829] [2021-06-05 22:03:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:29,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37926829] [2021-06-05 22:03:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37926829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612673280] [2021-06-05 22:03:29,315 INFO L93 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 22:03:29,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:29,445 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 12 treesize of output 8 [2021-06-05 22:03:29,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:29,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:29,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:29,462 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:03:29,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:29,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:03:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612673280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:29,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:29,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203425524] [2021-06-05 22:03:29,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:29,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:29,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:29,499 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 22:03:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:29,685 INFO L93 Difference]: Finished difference Result 467 states and 1384 transitions. [2021-06-05 22:03:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:29,685 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 22:03:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:29,686 INFO L225 Difference]: With dead ends: 467 [2021-06-05 22:03:29,686 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 22:03:29,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:29,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 22:03:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 315. [2021-06-05 22:03:29,689 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 22:03:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 948 transitions. [2021-06-05 22:03:29,690 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 948 transitions. Word has length 20 [2021-06-05 22:03:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:29,690 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 948 transitions. [2021-06-05 22:03:29,690 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 22:03:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 948 transitions. [2021-06-05 22:03:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:29,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:29,690 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:29,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:29,891 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1897539241, now seen corresponding path program 340 times [2021-06-05 22:03:29,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:29,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046719626] [2021-06-05 22:03:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:29,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046719626] [2021-06-05 22:03:29,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046719626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786282718] [2021-06-05 22:03:29,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:30,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:30,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:30,085 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 12 treesize of output 8 [2021-06-05 22:03:30,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:30,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:30,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:30,102 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:03:30,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:30,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:03:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:30,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786282718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:30,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:30,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:30,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359742880] [2021-06-05 22:03:30,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:30,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:30,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:30,158 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 22:03:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:30,369 INFO L93 Difference]: Finished difference Result 471 states and 1376 transitions. [2021-06-05 22:03:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:30,369 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 22:03:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:30,370 INFO L225 Difference]: With dead ends: 471 [2021-06-05 22:03:30,370 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 22:03:30,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 22:03:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 318. [2021-06-05 22:03:30,373 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 22:03:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 963 transitions. [2021-06-05 22:03:30,374 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 963 transitions. Word has length 20 [2021-06-05 22:03:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:30,374 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 963 transitions. [2021-06-05 22:03:30,374 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 22:03:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 963 transitions. [2021-06-05 22:03:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:30,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:30,374 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:30,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:30,574 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash 440291099, now seen corresponding path program 341 times [2021-06-05 22:03:30,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:30,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601697141] [2021-06-05 22:03:30,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:30,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:30,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601697141] [2021-06-05 22:03:30,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601697141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:30,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141005954] [2021-06-05 22:03:30,630 INFO L93 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 22:03:30,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:30,758 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 22:03:30,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:30,761 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 13 treesize of output 9 [2021-06-05 22:03:30,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:30,775 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:03:30,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:30,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:03:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:30,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141005954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:30,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:30,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:30,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600476770] [2021-06-05 22:03:30,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:30,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:30,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:30,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:30,827 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 22:03:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:31,025 INFO L93 Difference]: Finished difference Result 428 states and 1279 transitions. [2021-06-05 22:03:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:31,025 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 22:03:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:31,026 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:03:31,026 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 22:03:31,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 22:03:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2021-06-05 22:03:31,028 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 22:03:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 22:03:31,029 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 22:03:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:31,029 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 22:03:31,029 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 22:03:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 22:03:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:31,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:31,029 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:31,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3241,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:31,230 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:31,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1060624641, now seen corresponding path program 342 times [2021-06-05 22:03:31,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:31,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598671254] [2021-06-05 22:03:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:31,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598671254] [2021-06-05 22:03:31,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598671254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167141965] [2021-06-05 22:03:31,289 INFO L93 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 22:03:31,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:31,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:31,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:31,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167141965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:31,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:31,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555519812] [2021-06-05 22:03:31,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:31,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:31,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:31,458 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 22:03:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:31,663 INFO L93 Difference]: Finished difference Result 381 states and 1121 transitions. [2021-06-05 22:03:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:31,663 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 22:03:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:31,663 INFO L225 Difference]: With dead ends: 381 [2021-06-05 22:03:31,663 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 22:03:31,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 22:03:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 315. [2021-06-05 22:03:31,666 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 22:03:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 951 transitions. [2021-06-05 22:03:31,667 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 951 transitions. Word has length 20 [2021-06-05 22:03:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:31,667 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 951 transitions. [2021-06-05 22:03:31,667 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 22:03:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 951 transitions. [2021-06-05 22:03:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:31,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:31,667 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:31,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-06-05 22:03:31,868 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash -896512315, now seen corresponding path program 343 times [2021-06-05 22:03:31,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:31,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680229887] [2021-06-05 22:03:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:31,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680229887] [2021-06-05 22:03:31,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680229887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420696721] [2021-06-05 22:03:31,927 INFO 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 22:03:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:32,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420696721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:32,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:32,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:32,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120078932] [2021-06-05 22:03:32,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:32,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:32,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:32,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:32,092 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 22:03:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:32,340 INFO L93 Difference]: Finished difference Result 387 states and 1136 transitions. [2021-06-05 22:03:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:32,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:32,341 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:03:32,341 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 22:03:32,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 22:03:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-06-05 22:03:32,344 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 22:03:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 936 transitions. [2021-06-05 22:03:32,344 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 936 transitions. Word has length 20 [2021-06-05 22:03:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:32,344 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 936 transitions. [2021-06-05 22:03:32,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 936 transitions. [2021-06-05 22:03:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:32,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:32,345 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:32,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-06-05 22:03:32,545 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash -893886539, now seen corresponding path program 344 times [2021-06-05 22:03:32,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:32,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835041] [2021-06-05 22:03:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:32,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:32,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835041] [2021-06-05 22:03:32,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:32,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249285029] [2021-06-05 22:03:32,602 INFO L93 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 22:03:32,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:32,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:32,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249285029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:32,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:32,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:32,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43282964] [2021-06-05 22:03:32,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:32,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:32,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:32,764 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 22:03:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:32,953 INFO L93 Difference]: Finished difference Result 345 states and 1029 transitions. [2021-06-05 22:03:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:32,954 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 22:03:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:32,954 INFO L225 Difference]: With dead ends: 345 [2021-06-05 22:03:32,954 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 22:03:32,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 22:03:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2021-06-05 22:03:32,957 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 22:03:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-06-05 22:03:32,957 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-06-05 22:03:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:32,957 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-06-05 22:03:32,957 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 22:03:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-06-05 22:03:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:32,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:32,958 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:33,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:33,158 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1304929953, now seen corresponding path program 345 times [2021-06-05 22:03:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:33,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451974608] [2021-06-05 22:03:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:33,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451974608] [2021-06-05 22:03:33,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451974608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012707509] [2021-06-05 22:03:33,222 INFO L93 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 22:03:33,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:33,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:33,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012707509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:33,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:33,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20955006] [2021-06-05 22:03:33,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:33,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:33,394 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 22:03:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:33,700 INFO L93 Difference]: Finished difference Result 510 states and 1432 transitions. [2021-06-05 22:03:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:33,701 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 22:03:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:33,701 INFO L225 Difference]: With dead ends: 510 [2021-06-05 22:03:33,701 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 22:03:33,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 22:03:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 313. [2021-06-05 22:03:33,705 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 22:03:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 951 transitions. [2021-06-05 22:03:33,705 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 951 transitions. Word has length 20 [2021-06-05 22:03:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:33,705 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 951 transitions. [2021-06-05 22:03:33,705 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 22:03:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 951 transitions. [2021-06-05 22:03:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:33,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:33,706 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:33,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:33,906 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash -188977769, now seen corresponding path program 346 times [2021-06-05 22:03:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:33,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883847011] [2021-06-05 22:03:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883847011] [2021-06-05 22:03:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883847011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111269792] [2021-06-05 22:03:33,970 INFO L93 rtionOrderModulation]: Changing 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 22:03:34,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:34,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:34,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:34,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111269792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:34,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:34,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610818115] [2021-06-05 22:03:34,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:34,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:34,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:34,143 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 22:03:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:34,339 INFO L93 Difference]: Finished difference Result 444 states and 1278 transitions. [2021-06-05 22:03:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:34,339 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 22:03:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:34,340 INFO L225 Difference]: With dead ends: 444 [2021-06-05 22:03:34,340 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 22:03:34,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 22:03:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 307. [2021-06-05 22:03:34,343 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 22:03:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 22:03:34,344 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 22:03:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:34,344 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 22:03:34,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 22:03:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:34,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:34,344 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:34,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:34,545 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2056330391, now seen corresponding path program 347 times [2021-06-05 22:03:34,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:34,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556034931] [2021-06-05 22:03:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:34,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:34,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556034931] [2021-06-05 22:03:34,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556034931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:34,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556242503] [2021-06-05 22:03:34,614 INFO L93 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 22:03:34,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:34,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:34,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556242503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:34,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:34,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:34,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877066585] [2021-06-05 22:03:34,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:34,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:34,789 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 22:03:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:35,005 INFO L93 Difference]: Finished difference Result 515 states and 1476 transitions. [2021-06-05 22:03:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:35,005 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 22:03:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:35,006 INFO L225 Difference]: With dead ends: 515 [2021-06-05 22:03:35,006 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 22:03:35,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 22:03:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 310. [2021-06-05 22:03:35,009 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 22:03:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 941 transitions. [2021-06-05 22:03:35,010 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 941 transitions. Word has length 20 [2021-06-05 22:03:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:35,010 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 941 transitions. [2021-06-05 22:03:35,010 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 22:03:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 941 transitions. [2021-06-05 22:03:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:35,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:35,010 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:35,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3279 [2021-06-05 22:03:35,211 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:35,211 INFO L82 PathProgramCache]: Analyzing trace with hash -946294505, now seen corresponding path program 348 times [2021-06-05 22:03:35,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:35,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589718909] [2021-06-05 22:03:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:35,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:35,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589718909] [2021-06-05 22:03:35,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589718909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285263292] [2021-06-05 22:03:35,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:35,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:35,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:35,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:35,450 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 22:03:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285263292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:35,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503730606] [2021-06-05 22:03:35,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:35,451 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 22:03:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:35,670 INFO L93 Difference]: Finished difference Result 484 states and 1409 transitions. [2021-06-05 22:03:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:35,671 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 22:03:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:35,671 INFO L225 Difference]: With dead ends: 484 [2021-06-05 22:03:35,671 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 22:03:35,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 22:03:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 307. [2021-06-05 22:03:35,674 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 22:03:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 22:03:35,675 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 22:03:35,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:35,675 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 22:03:35,675 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 22:03:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 22:03:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:35,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:35,675 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:35,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-06-05 22:03:35,876 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2077066919, now seen corresponding path program 349 times [2021-06-05 22:03:35,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:35,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568915660] [2021-06-05 22:03:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:35,939 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 22:03:35,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:35,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568915660] [2021-06-05 22:03:35,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568915660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379392136] [2021-06-05 22:03:35,939 INFO 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 22:03:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379392136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:36,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:36,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828190347] [2021-06-05 22:03:36,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:36,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:36,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:36,115 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 22:03:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:36,289 INFO L93 Difference]: Finished difference Result 481 states and 1357 transitions. [2021-06-05 22:03:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:36,289 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 22:03:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:36,290 INFO L225 Difference]: With dead ends: 481 [2021-06-05 22:03:36,290 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 22:03:36,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 22:03:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 311. [2021-06-05 22:03:36,293 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 22:03:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 940 transitions. [2021-06-05 22:03:36,294 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 940 transitions. Word has length 20 [2021-06-05 22:03:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:36,294 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 940 transitions. [2021-06-05 22:03:36,294 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 22:03:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 940 transitions. [2021-06-05 22:03:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:36,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:36,294 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:36,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:36,495 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:36,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:36,495 INFO L82 PathProgramCache]: Analyzing trace with hash 161642993, now seen corresponding path program 350 times [2021-06-05 22:03:36,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:36,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380279178] [2021-06-05 22:03:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380279178] [2021-06-05 22:03:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380279178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943937695] [2021-06-05 22:03:36,564 INFO L93 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 22:03:36,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943937695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:36,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031094219] [2021-06-05 22:03:36,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:36,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:36,734 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 22:03:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:36,985 INFO L93 Difference]: Finished difference Result 487 states and 1378 transitions. [2021-06-05 22:03:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:36,985 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 22:03:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:36,986 INFO L225 Difference]: With dead ends: 487 [2021-06-05 22:03:36,986 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 22:03:36,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 22:03:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-06-05 22:03:36,989 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 22:03:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-06-05 22:03:36,989 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-06-05 22:03:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:36,990 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-06-05 22:03:36,990 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 22:03:36,990 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-06-05 22:03:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:36,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:36,990 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:37,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:37,190 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:37,191 INFO L82 PathProgramCache]: Analyzing trace with hash -56098239, now seen corresponding path program 351 times [2021-06-05 22:03:37,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:37,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945549463] [2021-06-05 22:03:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:37,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945549463] [2021-06-05 22:03:37,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945549463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741095429] [2021-06-05 22:03:37,256 INFO L93 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 22:03:37,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:37,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:37,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741095429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:37,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:37,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836640175] [2021-06-05 22:03:37,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:37,439 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 22:03:37,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:37,675 INFO L93 Difference]: Finished difference Result 429 states and 1262 transitions. [2021-06-05 22:03:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:37,676 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 22:03:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:37,676 INFO L225 Difference]: With dead ends: 429 [2021-06-05 22:03:37,676 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 22:03:37,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 22:03:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 311. [2021-06-05 22:03:37,679 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 22:03:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 942 transitions. [2021-06-05 22:03:37,680 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 942 transitions. Word has length 20 [2021-06-05 22:03:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:37,680 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 942 transitions. [2021-06-05 22:03:37,680 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 22:03:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 942 transitions. [2021-06-05 22:03:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:37,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:37,680 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:37,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:37,881 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1236244161, now seen corresponding path program 352 times [2021-06-05 22:03:37,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:37,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815881940] [2021-06-05 22:03:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:37,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815881940] [2021-06-05 22:03:37,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815881940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524149581] [2021-06-05 22:03:37,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:38,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:38,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:38,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:38,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524149581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:38,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:38,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:38,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884206182] [2021-06-05 22:03:38,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:38,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:38,125 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 22:03:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:38,307 INFO L93 Difference]: Finished difference Result 423 states and 1244 transitions. [2021-06-05 22:03:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:38,307 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 22:03:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:38,308 INFO L225 Difference]: With dead ends: 423 [2021-06-05 22:03:38,308 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 22:03:38,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 22:03:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 308. [2021-06-05 22:03:38,312 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 22:03:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-06-05 22:03:38,312 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 20 [2021-06-05 22:03:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:38,312 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-06-05 22:03:38,312 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 22:03:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-06-05 22:03:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:38,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:38,313 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:38,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-06-05 22:03:38,513 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash -659620875, now seen corresponding path program 353 times [2021-06-05 22:03:38,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:38,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979844334] [2021-06-05 22:03:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:38,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:38,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979844334] [2021-06-05 22:03:38,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979844334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:38,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398925439] [2021-06-05 22:03:38,580 INFO L93 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 22:03:38,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:38,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:38,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:38,751 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 22:03:38,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398925439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:38,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:38,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:38,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147853970] [2021-06-05 22:03:38,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:38,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:38,752 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 22:03:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:38,948 INFO L93 Difference]: Finished difference Result 384 states and 1137 transitions. [2021-06-05 22:03:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:38,948 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 22:03:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:38,949 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:03:38,949 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 22:03:38,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 22:03:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 305. [2021-06-05 22:03:38,952 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 22:03:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-06-05 22:03:38,952 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-06-05 22:03:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:38,952 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-06-05 22:03:38,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-06-05 22:03:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:38,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:38,953 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:39,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:39,153 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1302818889, now seen corresponding path program 354 times [2021-06-05 22:03:39,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:39,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756714452] [2021-06-05 22:03:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:39,219 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 22:03:39,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:39,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756714452] [2021-06-05 22:03:39,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756714452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:39,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549873431] [2021-06-05 22:03:39,219 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 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 22:03:39,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:39,389 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 22:03:39,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549873431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:39,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:39,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:39,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17518843] [2021-06-05 22:03:39,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:39,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:39,390 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 22:03:39,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:39,578 INFO L93 Difference]: Finished difference Result 385 states and 1112 transitions. [2021-06-05 22:03:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:39,578 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 22:03:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:39,578 INFO L225 Difference]: With dead ends: 385 [2021-06-05 22:03:39,578 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 22:03:39,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 22:03:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 313. [2021-06-05 22:03:39,581 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 22:03:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 941 transitions. [2021-06-05 22:03:39,582 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 941 transitions. Word has length 20 [2021-06-05 22:03:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:39,582 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 941 transitions. [2021-06-05 22:03:39,582 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 22:03:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 941 transitions. [2021-06-05 22:03:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:39,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:39,582 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:39,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-06-05 22:03:39,783 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1076724481, now seen corresponding path program 355 times [2021-06-05 22:03:39,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:39,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421238128] [2021-06-05 22:03:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:39,846 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 22:03:39,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:39,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421238128] [2021-06-05 22:03:39,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421238128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:39,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750119354] [2021-06-05 22:03:39,847 INFO 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 22:03:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:39,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:39,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:40,017 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 22:03:40,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750119354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:40,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:40,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939901026] [2021-06-05 22:03:40,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:40,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:40,018 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 22:03:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:40,227 INFO L93 Difference]: Finished difference Result 391 states and 1133 transitions. [2021-06-05 22:03:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:40,227 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 22:03:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:40,228 INFO L225 Difference]: With dead ends: 391 [2021-06-05 22:03:40,228 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 22:03:40,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:40,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 22:03:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 309. [2021-06-05 22:03:40,231 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 22:03:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 927 transitions. [2021-06-05 22:03:40,231 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 927 transitions. Word has length 20 [2021-06-05 22:03:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:40,231 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 927 transitions. [2021-06-05 22:03:40,231 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 22:03:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 927 transitions. [2021-06-05 22:03:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:40,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:40,232 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:40,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:40,432 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2116960279, now seen corresponding path program 356 times [2021-06-05 22:03:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440551360] [2021-06-05 22:03:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:40,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440551360] [2021-06-05 22:03:40,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440551360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731194833] [2021-06-05 22:03:40,494 INFO L93 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 22:03:40,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:40,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:40,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:40,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:40,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731194833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:40,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:40,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252019744] [2021-06-05 22:03:40,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:40,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:40,669 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 22:03:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:40,851 INFO L93 Difference]: Finished difference Result 366 states and 1083 transitions. [2021-06-05 22:03:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:40,851 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 22:03:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:40,852 INFO L225 Difference]: With dead ends: 366 [2021-06-05 22:03:40,852 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:03:40,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:03:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-06-05 22:03:40,854 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 22:03:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 912 transitions. [2021-06-05 22:03:40,855 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 912 transitions. Word has length 20 [2021-06-05 22:03:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:40,855 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 912 transitions. [2021-06-05 22:03:40,855 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 22:03:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 912 transitions. [2021-06-05 22:03:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:40,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:40,855 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:41,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:41,056 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:41,056 INFO L82 PathProgramCache]: Analyzing trace with hash -41862621, now seen corresponding path program 357 times [2021-06-05 22:03:41,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:41,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965421765] [2021-06-05 22:03:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:41,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:41,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965421765] [2021-06-05 22:03:41,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965421765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907918300] [2021-06-05 22:03:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:41,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:41,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:41,223 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 22:03:41,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:41,226 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 13 treesize of output 9 [2021-06-05 22:03:41,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:41,241 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:03:41,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:41,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:03:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:41,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907918300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:41,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:41,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783281573] [2021-06-05 22:03:41,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:41,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:41,277 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 22:03:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:41,448 INFO L93 Difference]: Finished difference Result 446 states and 1311 transitions. [2021-06-05 22:03:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:41,449 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 22:03:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:41,449 INFO L225 Difference]: With dead ends: 446 [2021-06-05 22:03:41,449 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 22:03:41,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 22:03:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 303. [2021-06-05 22:03:41,453 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 22:03:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 908 transitions. [2021-06-05 22:03:41,453 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 908 transitions. Word has length 20 [2021-06-05 22:03:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:41,453 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 908 transitions. [2021-06-05 22:03:41,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 908 transitions. [2021-06-05 22:03:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:41,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:41,454 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:41,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:41,654 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1591188771, now seen corresponding path program 358 times [2021-06-05 22:03:41,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:41,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352090764] [2021-06-05 22:03:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:41,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:41,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352090764] [2021-06-05 22:03:41,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352090764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898419965] [2021-06-05 22:03:41,715 INFO L93 rtionOrderModulation]: Changing 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 22:03:41,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:41,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:41,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:41,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:41,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:41,834 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 13 treesize of output 9 [2021-06-05 22:03:41,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:41,849 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:03:41,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:41,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:03:41,881 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 22:03:41,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898419965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:41,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:03:41,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521717077] [2021-06-05 22:03:41,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:03:41,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:03:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:03:41,882 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 22:03:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:42,066 INFO L93 Difference]: Finished difference Result 481 states and 1401 transitions. [2021-06-05 22:03:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:42,067 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 22:03:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:42,071 INFO L225 Difference]: With dead ends: 481 [2021-06-05 22:03:42,071 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 22:03:42,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 22:03:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 306. [2021-06-05 22:03:42,075 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 22:03:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 923 transitions. [2021-06-05 22:03:42,075 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 923 transitions. Word has length 20 [2021-06-05 22:03:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:42,075 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 923 transitions. [2021-06-05 22:03:42,075 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 22:03:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 923 transitions. [2021-06-05 22:03:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:42,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:42,076 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:42,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:42,276 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash -365948185, now seen corresponding path program 359 times [2021-06-05 22:03:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:42,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478330001] [2021-06-05 22:03:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:42,355 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 22:03:42,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478330001] [2021-06-05 22:03:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478330001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628994969] [2021-06-05 22:03:42,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:42,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:42,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:42,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:42,485 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 12 treesize of output 8 [2021-06-05 22:03:42,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:42,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:42,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:42,502 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:03:42,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:42,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:03:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628994969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:42,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:03:42,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696233892] [2021-06-05 22:03:42,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:03:42,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:42,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:03:42,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:03:42,532 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 22:03:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:42,696 INFO L93 Difference]: Finished difference Result 438 states and 1304 transitions. [2021-06-05 22:03:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:42,697 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 22:03:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:42,697 INFO L225 Difference]: With dead ends: 438 [2021-06-05 22:03:42,697 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 22:03:42,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 22:03:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-06-05 22:03:42,701 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 22:03:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 884 transitions. [2021-06-05 22:03:42,702 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 884 transitions. Word has length 20 [2021-06-05 22:03:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:42,702 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 884 transitions. [2021-06-05 22:03:42,702 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 22:03:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 884 transitions. [2021-06-05 22:03:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:42,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:42,703 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:42,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3360,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:42,923 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 254385357, now seen corresponding path program 360 times [2021-06-05 22:03:42,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:42,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115076917] [2021-06-05 22:03:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:42,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:42,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115076917] [2021-06-05 22:03:42,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115076917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816932880] [2021-06-05 22:03:42,979 INFO L93 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 22:03:43,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:43,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:43,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:43,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816932880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:43,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:43,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:43,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475190704] [2021-06-05 22:03:43,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:43,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:43,132 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 22:03:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:43,327 INFO L93 Difference]: Finished difference Result 376 states and 1086 transitions. [2021-06-05 22:03:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:43,328 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 22:03:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:43,328 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:03:43,328 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:03:43,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:03:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-06-05 22:03:43,331 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 22:03:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-06-05 22:03:43,331 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-06-05 22:03:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:43,331 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-06-05 22:03:43,331 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 22:03:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-06-05 22:03:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:43,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:43,332 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:43,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:43,532 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:43,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1702751599, now seen corresponding path program 361 times [2021-06-05 22:03:43,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:43,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288813302] [2021-06-05 22:03:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:43,588 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 22:03:43,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288813302] [2021-06-05 22:03:43,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288813302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145829377] [2021-06-05 22:03:43,588 INFO 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 22:03:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:43,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:43,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145829377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:43,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:43,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:43,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084758] [2021-06-05 22:03:43,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:43,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:43,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:43,740 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 22:03:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:43,934 INFO L93 Difference]: Finished difference Result 378 states and 1090 transitions. [2021-06-05 22:03:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:43,934 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 22:03:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:43,935 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:03:43,935 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:03:43,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:03:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 295. [2021-06-05 22:03:43,937 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 22:03:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 871 transitions. [2021-06-05 22:03:43,938 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 871 transitions. Word has length 20 [2021-06-05 22:03:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:43,938 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 871 transitions. [2021-06-05 22:03:43,938 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 22:03:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 871 transitions. [2021-06-05 22:03:43,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:43,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:43,938 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:44,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-06-05 22:03:44,139 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:44,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125823, now seen corresponding path program 362 times [2021-06-05 22:03:44,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:44,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757471809] [2021-06-05 22:03:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:44,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757471809] [2021-06-05 22:03:44,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757471809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731940910] [2021-06-05 22:03:44,192 INFO L93 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 22:03:44,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731940910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:44,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:44,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734727259] [2021-06-05 22:03:44,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:44,341 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 22:03:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:44,513 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-06-05 22:03:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:44,514 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 22:03:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:44,514 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:03:44,514 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:03:44,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:03:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 276. [2021-06-05 22:03:44,517 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 22:03:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 812 transitions. [2021-06-05 22:03:44,517 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 812 transitions. Word has length 20 [2021-06-05 22:03:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:44,517 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 812 transitions. [2021-06-05 22:03:44,517 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 22:03:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 812 transitions. [2021-06-05 22:03:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:44,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:44,518 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:44,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:44,718 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1240422079, now seen corresponding path program 363 times [2021-06-05 22:03:44,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:44,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558110749] [2021-06-05 22:03:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558110749] [2021-06-05 22:03:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558110749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479448662] [2021-06-05 22:03:44,787 INFO L93 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 22:03:44,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:44,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:44,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:44,978 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 22:03:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479448662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:44,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151668079] [2021-06-05 22:03:44,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:44,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:44,979 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 22:03:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:45,173 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-06-05 22:03:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:45,173 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 22:03:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:45,174 INFO L225 Difference]: With dead ends: 406 [2021-06-05 22:03:45,174 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 22:03:45,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 22:03:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 285. [2021-06-05 22:03:45,177 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 22:03:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 851 transitions. [2021-06-05 22:03:45,177 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 851 transitions. Word has length 20 [2021-06-05 22:03:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:45,177 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 851 transitions. [2021-06-05 22:03:45,177 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 22:03:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 851 transitions. [2021-06-05 22:03:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:45,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:45,178 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:45,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-06-05 22:03:45,378 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1097408261, now seen corresponding path program 364 times [2021-06-05 22:03:45,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:45,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819271830] [2021-06-05 22:03:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:45,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819271830] [2021-06-05 22:03:45,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819271830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395870436] [2021-06-05 22:03:45,436 INFO L93 rtionOrderModulation]: Changing 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 22:03:45,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:45,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:45,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:45,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395870436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:45,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:45,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:45,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983420769] [2021-06-05 22:03:45,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:45,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:45,596 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 22:03:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:45,819 INFO L93 Difference]: Finished difference Result 412 states and 1188 transitions. [2021-06-05 22:03:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:45,820 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 22:03:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:45,820 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:03:45,820 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 22:03:45,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 22:03:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 282. [2021-06-05 22:03:45,823 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 22:03:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 836 transitions. [2021-06-05 22:03:45,824 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 836 transitions. Word has length 20 [2021-06-05 22:03:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:45,824 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 836 transitions. [2021-06-05 22:03:45,824 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 22:03:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 836 transitions. [2021-06-05 22:03:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:45,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:45,824 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:46,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:46,025 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1100034037, now seen corresponding path program 365 times [2021-06-05 22:03:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:46,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467451609] [2021-06-05 22:03:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467451609] [2021-06-05 22:03:46,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467451609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734599499] [2021-06-05 22:03:46,081 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 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 22:03:46,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:46,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:46,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734599499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:46,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695423177] [2021-06-05 22:03:46,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:46,232 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 22:03:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:46,427 INFO L93 Difference]: Finished difference Result 376 states and 1096 transitions. [2021-06-05 22:03:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:46,427 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 22:03:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:46,428 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:03:46,428 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:03:46,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:03:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 22:03:46,430 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 22:03:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 824 transitions. [2021-06-05 22:03:46,431 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 824 transitions. Word has length 20 [2021-06-05 22:03:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:46,431 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 824 transitions. [2021-06-05 22:03:46,431 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 22:03:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 824 transitions. [2021-06-05 22:03:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:46,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:46,431 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:46,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-06-05 22:03:46,632 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash -419004761, now seen corresponding path program 366 times [2021-06-05 22:03:46,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:46,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967857302] [2021-06-05 22:03:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:46,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967857302] [2021-06-05 22:03:46,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967857302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410812156] [2021-06-05 22:03:46,688 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 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 22:03:46,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:46,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:46,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410812156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:46,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:03:46,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279516304] [2021-06-05 22:03:46,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:03:46,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:46,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:03:46,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:03:46,826 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 22:03:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:47,001 INFO L93 Difference]: Finished difference Result 367 states and 1069 transitions. [2021-06-05 22:03:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:47,001 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 22:03:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:47,002 INFO L225 Difference]: With dead ends: 367 [2021-06-05 22:03:47,002 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 22:03:47,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 22:03:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-06-05 22:03:47,004 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 22:03:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-06-05 22:03:47,005 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2021-06-05 22:03:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:47,005 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-06-05 22:03:47,005 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 22:03:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-06-05 22:03:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:47,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:47,005 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:47,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-05 22:03:47,206 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:47,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:47,206 INFO L82 PathProgramCache]: Analyzing trace with hash 229944241, now seen corresponding path program 367 times [2021-06-05 22:03:47,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:47,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373196655] [2021-06-05 22:03:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:47,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:47,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373196655] [2021-06-05 22:03:47,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373196655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:47,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216512303] [2021-06-05 22:03:47,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:47,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:47,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216512303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:47,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:47,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:47,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240612686] [2021-06-05 22:03:47,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:47,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:47,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:47,459 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 22:03:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:47,699 INFO L93 Difference]: Finished difference Result 525 states and 1507 transitions. [2021-06-05 22:03:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:47,699 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 22:03:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:47,700 INFO L225 Difference]: With dead ends: 525 [2021-06-05 22:03:47,700 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 22:03:47,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 22:03:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 297. [2021-06-05 22:03:47,703 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 22:03:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2021-06-05 22:03:47,703 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2021-06-05 22:03:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:47,703 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2021-06-05 22:03:47,703 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 22:03:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2021-06-05 22:03:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:47,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:47,704 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:47,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:47,904 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1263963481, now seen corresponding path program 368 times [2021-06-05 22:03:47,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:47,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838478155] [2021-06-05 22:03:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:47,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:47,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838478155] [2021-06-05 22:03:47,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838478155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:47,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991606402] [2021-06-05 22:03:47,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:48,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:48,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:48,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:48,186 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 22:03:48,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991606402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:48,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:48,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:48,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831866042] [2021-06-05 22:03:48,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:48,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:48,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:48,187 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 22:03:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:48,419 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2021-06-05 22:03:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:48,419 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 22:03:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:48,420 INFO L225 Difference]: With dead ends: 511 [2021-06-05 22:03:48,420 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 22:03:48,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 22:03:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-06-05 22:03:48,423 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 22:03:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-06-05 22:03:48,423 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-06-05 22:03:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:48,423 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-06-05 22:03:48,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-06-05 22:03:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:48,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:48,424 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3409 [2021-06-05 22:03:48,624 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 981344679, now seen corresponding path program 369 times [2021-06-05 22:03:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276317299] [2021-06-05 22:03:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:48,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:48,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276317299] [2021-06-05 22:03:48,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276317299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:48,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326874339] [2021-06-05 22:03:48,698 INFO L93 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 22:03:48,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:48,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:48,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:48,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326874339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:48,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:48,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:48,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74123479] [2021-06-05 22:03:48,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:48,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:48,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:48,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:48,878 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 22:03:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:49,293 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2021-06-05 22:03:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:49,293 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 22:03:49,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:49,294 INFO L225 Difference]: With dead ends: 582 [2021-06-05 22:03:49,294 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 22:03:49,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 22:03:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2021-06-05 22:03:49,297 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 22:03:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 22:03:49,298 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 22:03:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:49,298 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 22:03:49,298 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 22:03:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 22:03:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:49,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:49,298 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:49,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:49,499 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2021280217, now seen corresponding path program 370 times [2021-06-05 22:03:49,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:49,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054425251] [2021-06-05 22:03:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:49,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:49,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054425251] [2021-06-05 22:03:49,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054425251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:49,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947238795] [2021-06-05 22:03:49,568 INFO L93 rtionOrderModulation]: Changing 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 22:03:49,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:49,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947238795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:49,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:49,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:49,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600835918] [2021-06-05 22:03:49,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:49,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:49,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:49,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:49,747 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 22:03:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:50,148 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2021-06-05 22:03:50,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:50,148 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 22:03:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:50,149 INFO L225 Difference]: With dead ends: 551 [2021-06-05 22:03:50,149 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 22:03:50,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 22:03:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2021-06-05 22:03:50,153 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 22:03:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-06-05 22:03:50,153 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-06-05 22:03:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:50,154 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-06-05 22:03:50,154 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 22:03:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-06-05 22:03:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:50,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:50,154 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:50,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-06-05 22:03:50,354 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1002081207, now seen corresponding path program 371 times [2021-06-05 22:03:50,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:50,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349567699] [2021-06-05 22:03:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:50,420 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 22:03:50,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349567699] [2021-06-05 22:03:50,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349567699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257604413] [2021-06-05 22:03:50,420 INFO L93 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 22:03:50,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:50,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:50,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:50,600 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 22:03:50,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257604413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:50,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:50,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:50,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820915444] [2021-06-05 22:03:50,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:50,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:50,600 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 22:03:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:50,961 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2021-06-05 22:03:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:50,961 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 22:03:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:50,962 INFO L225 Difference]: With dead ends: 548 [2021-06-05 22:03:50,962 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 22:03:50,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 22:03:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2021-06-05 22:03:50,965 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 22:03:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-06-05 22:03:50,965 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2021-06-05 22:03:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:50,966 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-06-05 22:03:50,966 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 22:03:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-06-05 22:03:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:50,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:50,966 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:51,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:51,166 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:51,167 INFO L82 PathProgramCache]: Analyzing trace with hash -913342719, now seen corresponding path program 372 times [2021-06-05 22:03:51,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:51,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344111907] [2021-06-05 22:03:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:51,234 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 22:03:51,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:51,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344111907] [2021-06-05 22:03:51,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344111907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:51,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578190769] [2021-06-05 22:03:51,235 INFO L93 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 22:03:51,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:51,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:51,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578190769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:51,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:51,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:51,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716763770] [2021-06-05 22:03:51,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:51,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:51,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:51,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:51,416 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 22:03:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:51,817 INFO L93 Difference]: Finished difference Result 531 states and 1517 transitions. [2021-06-05 22:03:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:51,817 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 22:03:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:51,818 INFO L225 Difference]: With dead ends: 531 [2021-06-05 22:03:51,818 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 22:03:51,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:51,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 22:03:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-06-05 22:03:51,821 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 22:03:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-06-05 22:03:51,822 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-06-05 22:03:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:51,822 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-06-05 22:03:51,822 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 22:03:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-06-05 22:03:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:51,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:51,822 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:52,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3442,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:52,023 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1131083951, now seen corresponding path program 373 times [2021-06-05 22:03:52,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:52,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877857598] [2021-06-05 22:03:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:52,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:52,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877857598] [2021-06-05 22:03:52,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877857598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217040873] [2021-06-05 22:03:52,092 INFO 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 22:03:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:52,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:52,267 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 22:03:52,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217040873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:52,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:52,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505434497] [2021-06-05 22:03:52,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:52,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:52,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:52,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:52,268 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 22:03:52,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:52,535 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2021-06-05 22:03:52,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:52,535 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 22:03:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:52,536 INFO L225 Difference]: With dead ends: 508 [2021-06-05 22:03:52,536 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 22:03:52,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 22:03:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2021-06-05 22:03:52,539 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 22:03:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 22:03:52,540 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 22:03:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:52,540 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 22:03:52,540 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 22:03:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 22:03:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:52,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:52,540 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:52,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-06-05 22:03:52,741 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash 161258449, now seen corresponding path program 374 times [2021-06-05 22:03:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:52,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238971825] [2021-06-05 22:03:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:52,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:52,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238971825] [2021-06-05 22:03:52,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238971825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534558651] [2021-06-05 22:03:52,817 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 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 22:03:52,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:52,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:52,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:52,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:53,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534558651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:53,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:53,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:53,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071242742] [2021-06-05 22:03:53,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:53,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:53,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:53,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:53,002 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 22:03:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:53,338 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2021-06-05 22:03:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:53,338 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 22:03:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:53,339 INFO L225 Difference]: With dead ends: 502 [2021-06-05 22:03:53,339 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 22:03:53,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 22:03:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2021-06-05 22:03:53,342 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 22:03:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-06-05 22:03:53,342 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2021-06-05 22:03:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:53,342 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-06-05 22:03:53,343 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 22:03:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-06-05 22:03:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:53,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:53,343 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:53,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:53,543 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:53,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1734606587, now seen corresponding path program 375 times [2021-06-05 22:03:53,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:53,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936160328] [2021-06-05 22:03:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:53,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:53,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936160328] [2021-06-05 22:03:53,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936160328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:53,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925567254] [2021-06-05 22:03:53,608 INFO L93 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 22:03:53,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:53,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:53,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:53,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:53,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925567254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:53,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:53,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:53,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160032267] [2021-06-05 22:03:53,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:53,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:53,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:53,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:53,784 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 22:03:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:54,078 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2021-06-05 22:03:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:54,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:54,079 INFO L225 Difference]: With dead ends: 463 [2021-06-05 22:03:54,079 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 22:03:54,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 22:03:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2021-06-05 22:03:54,082 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 22:03:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-06-05 22:03:54,083 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-06-05 22:03:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:54,083 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-06-05 22:03:54,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-06-05 22:03:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:54,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:54,083 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:54,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:54,284 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1917162695, now seen corresponding path program 376 times [2021-06-05 22:03:54,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:54,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244528663] [2021-06-05 22:03:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:54,346 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 22:03:54,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:54,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244528663] [2021-06-05 22:03:54,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244528663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:54,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449269017] [2021-06-05 22:03:54,346 INFO L93 rtionOrderModulation]: Changing 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 22:03:54,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:54,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:54,529 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 22:03:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449269017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:54,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:54,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:54,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278369062] [2021-06-05 22:03:54,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:54,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:54,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:54,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:54,530 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 22:03:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:54,761 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2021-06-05 22:03:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:54,761 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 22:03:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:54,762 INFO L225 Difference]: With dead ends: 478 [2021-06-05 22:03:54,762 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 22:03:54,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 22:03:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2021-06-05 22:03:54,765 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 22:03:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 22:03:54,765 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 22:03:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:54,765 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 22:03:54,765 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 22:03:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 22:03:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:54,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:54,766 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:54,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3469,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:54,966 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1738769, now seen corresponding path program 377 times [2021-06-05 22:03:54,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:54,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701062783] [2021-06-05 22:03:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:55,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:55,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701062783] [2021-06-05 22:03:55,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701062783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391952925] [2021-06-05 22:03:55,033 INFO L93 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 22:03:55,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:55,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:55,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:55,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:55,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391952925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:55,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:55,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325211898] [2021-06-05 22:03:55,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:55,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:55,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:55,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:55,211 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 22:03:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:55,542 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2021-06-05 22:03:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:55,542 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 22:03:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:55,543 INFO L225 Difference]: With dead ends: 484 [2021-06-05 22:03:55,543 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 22:03:55,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 22:03:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2021-06-05 22:03:55,547 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 22:03:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-06-05 22:03:55,548 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-06-05 22:03:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:55,548 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-06-05 22:03:55,548 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 22:03:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-06-05 22:03:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:55,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:55,549 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:55,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:55,762 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1041974567, now seen corresponding path program 378 times [2021-06-05 22:03:55,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:55,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809670177] [2021-06-05 22:03:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:55,826 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 22:03:55,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:55,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809670177] [2021-06-05 22:03:55,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809670177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082541476] [2021-06-05 22:03:55,826 INFO L93 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 22:03:55,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:55,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:56,020 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 22:03:56,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082541476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:56,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:56,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:56,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666517466] [2021-06-05 22:03:56,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:56,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:56,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:56,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:56,021 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 22:03:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:56,261 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2021-06-05 22:03:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:56,261 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 22:03:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:56,262 INFO L225 Difference]: With dead ends: 459 [2021-06-05 22:03:56,262 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 22:03:56,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 22:03:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2021-06-05 22:03:56,265 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 22:03:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2021-06-05 22:03:56,265 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2021-06-05 22:03:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:56,265 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2021-06-05 22:03:56,265 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 22:03:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2021-06-05 22:03:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:56,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:56,266 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:56,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-06-05 22:03:56,466 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1890949637, now seen corresponding path program 379 times [2021-06-05 22:03:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:56,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750366217] [2021-06-05 22:03:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:56,536 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 22:03:56,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:56,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750366217] [2021-06-05 22:03:56,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750366217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:56,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241933107] [2021-06-05 22:03:56,537 INFO 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 22:03:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:56,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241933107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:56,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:56,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:56,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293443752] [2021-06-05 22:03:56,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:56,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:56,711 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 22:03:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:56,991 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2021-06-05 22:03:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:56,991 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 22:03:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:56,992 INFO L225 Difference]: With dead ends: 556 [2021-06-05 22:03:56,992 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 22:03:56,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 22:03:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2021-06-05 22:03:56,995 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 22:03:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-06-05 22:03:56,996 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-06-05 22:03:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:56,996 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-06-05 22:03:56,996 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 22:03:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-06-05 22:03:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:56,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:56,996 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:57,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3490,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:57,197 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1111675259, now seen corresponding path program 380 times [2021-06-05 22:03:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:57,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905322387] [2021-06-05 22:03:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:57,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:57,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905322387] [2021-06-05 22:03:57,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905322387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:57,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135533426] [2021-06-05 22:03:57,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:03:57,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:57,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:57,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:57,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135533426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:57,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:57,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:57,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952625931] [2021-06-05 22:03:57,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:57,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:57,439 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 22:03:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:57,773 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2021-06-05 22:03:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:57,773 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 22:03:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:57,774 INFO L225 Difference]: With dead ends: 558 [2021-06-05 22:03:57,774 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 22:03:57,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 22:03:57,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-06-05 22:03:57,779 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 22:03:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2021-06-05 22:03:57,779 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2021-06-05 22:03:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:57,779 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2021-06-05 22:03:57,779 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 22:03:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2021-06-05 22:03:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:57,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:57,780 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:57,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3496 [2021-06-05 22:03:57,985 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1287427001, now seen corresponding path program 381 times [2021-06-05 22:03:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724047728] [2021-06-05 22:03:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:58,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724047728] [2021-06-05 22:03:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724047728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120801411] [2021-06-05 22:03:58,050 INFO L93 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 22:03:58,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120801411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:58,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:58,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426507029] [2021-06-05 22:03:58,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:58,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:58,232 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 22:03:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:58,466 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2021-06-05 22:03:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:58,467 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 22:03:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:58,467 INFO L225 Difference]: With dead ends: 509 [2021-06-05 22:03:58,467 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 22:03:58,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 22:03:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2021-06-05 22:03:58,472 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 22:03:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2021-06-05 22:03:58,473 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2021-06-05 22:03:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:58,473 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2021-06-05 22:03:58,473 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 22:03:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2021-06-05 22:03:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:58,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:58,474 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:58,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:58,690 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1746703769, now seen corresponding path program 382 times [2021-06-05 22:03:58,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:58,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797873523] [2021-06-05 22:03:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:58,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797873523] [2021-06-05 22:03:58,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797873523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138097747] [2021-06-05 22:03:58,747 INFO L93 rtionOrderModulation]: Changing 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 22:03:58,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:58,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138097747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:58,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:58,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803940335] [2021-06-05 22:03:58,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:58,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:58,905 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 22:03:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:59,132 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2021-06-05 22:03:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:59,132 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 22:03:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:59,133 INFO L225 Difference]: With dead ends: 544 [2021-06-05 22:03:59,133 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 22:03:59,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 22:03:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2021-06-05 22:03:59,137 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 22:03:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2021-06-05 22:03:59,137 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2021-06-05 22:03:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:59,137 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2021-06-05 22:03:59,138 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 22:03:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2021-06-05 22:03:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:59,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:59,138 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:59,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3506,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:59,339 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash 7762133, now seen corresponding path program 383 times [2021-06-05 22:03:59,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:59,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970787238] [2021-06-05 22:03:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:59,396 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 22:03:59,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:59,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970787238] [2021-06-05 22:03:59,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970787238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:59,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441037136] [2021-06-05 22:03:59,396 INFO L93 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 22:03:59,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:59,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:59,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441037136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:59,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:59,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:59,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900740725] [2021-06-05 22:03:59,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:59,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:59,557 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 22:03:59,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:59,784 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2021-06-05 22:03:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:59,784 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 22:03:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:59,784 INFO L225 Difference]: With dead ends: 442 [2021-06-05 22:03:59,784 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 22:03:59,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 22:03:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2021-06-05 22:03:59,787 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 22:03:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2021-06-05 22:03:59,788 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2021-06-05 22:03:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:59,788 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2021-06-05 22:03:59,788 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 22:03:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2021-06-05 22:03:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:59,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:59,788 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:59,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:59,989 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1907661793, now seen corresponding path program 384 times [2021-06-05 22:03:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:59,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522177939] [2021-06-05 22:03:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:00,048 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 22:04:00,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:00,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522177939] [2021-06-05 22:04:00,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522177939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919332447] [2021-06-05 22:04:00,048 INFO L93 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 22:04:00,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:04:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:00,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919332447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:00,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557297583] [2021-06-05 22:04:00,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:00,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:00,208 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 22:04:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:00,504 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2021-06-05 22:04:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:00,505 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 22:04:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:00,505 INFO L225 Difference]: With dead ends: 448 [2021-06-05 22:04:00,505 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 22:04:00,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 22:04:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2021-06-05 22:04:00,508 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 22:04:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2021-06-05 22:04:00,509 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2021-06-05 22:04:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:00,509 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2021-06-05 22:04:00,509 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 22:04:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2021-06-05 22:04:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:00,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:00,509 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:00,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3518,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:00,710 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:00,710 INFO L82 PathProgramCache]: Analyzing trace with hash -867425995, now seen corresponding path program 385 times [2021-06-05 22:04:00,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:00,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961900673] [2021-06-05 22:04:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:00,768 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 22:04:00,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:00,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961900673] [2021-06-05 22:04:00,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961900673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489700765] [2021-06-05 22:04:00,768 INFO 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 22:04:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:00,923 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 22:04:00,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489700765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:00,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:00,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809067629] [2021-06-05 22:04:00,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:00,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:00,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:00,924 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 22:04:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:01,158 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2021-06-05 22:04:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:01,159 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 22:04:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:01,159 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:04:01,159 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 22:04:01,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 22:04:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2021-06-05 22:04:01,162 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 22:04:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2021-06-05 22:04:01,162 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2021-06-05 22:04:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:01,162 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2021-06-05 22:04:01,162 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 22:04:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2021-06-05 22:04:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:01,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:01,163 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:01,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-06-05 22:04:01,363 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 892626945, now seen corresponding path program 386 times [2021-06-05 22:04:01,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:01,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239242240] [2021-06-05 22:04:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:01,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239242240] [2021-06-05 22:04:01,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239242240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207205695] [2021-06-05 22:04:01,419 INFO L93 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 22:04:01,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:01,560 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 22:04:01,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207205695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:01,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:01,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:04:01,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353498475] [2021-06-05 22:04:01,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:04:01,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:04:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:04:01,561 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 22:04:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:01,792 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2021-06-05 22:04:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:01,792 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 22:04:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:01,793 INFO L225 Difference]: With dead ends: 456 [2021-06-05 22:04:01,793 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 22:04:01,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 22:04:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2021-06-05 22:04:01,797 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 22:04:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2021-06-05 22:04:01,797 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2021-06-05 22:04:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:01,797 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2021-06-05 22:04:01,798 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 22:04:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2021-06-05 22:04:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:01,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:01,798 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:02,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:02,013 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:02,013 INFO L82 PathProgramCache]: Analyzing trace with hash 537179841, now seen corresponding path program 387 times [2021-06-05 22:04:02,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:02,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005979125] [2021-06-05 22:04:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:02,079 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 22:04:02,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:02,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005979125] [2021-06-05 22:04:02,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005979125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:02,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348348578] [2021-06-05 22:04:02,079 INFO L93 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 22:04:02,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:02,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:02,316 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 22:04:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348348578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:02,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:02,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:02,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904067723] [2021-06-05 22:04:02,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:02,317 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 22:04:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:02,651 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2021-06-05 22:04:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:02,651 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 22:04:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:02,651 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:04:02,652 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:04:02,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:04:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2021-06-05 22:04:02,654 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 22:04:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2021-06-05 22:04:02,655 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2021-06-05 22:04:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:02,655 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2021-06-05 22:04:02,655 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 22:04:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2021-06-05 22:04:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:02,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:02,655 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:02,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3535 [2021-06-05 22:04:02,856 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash -956727881, now seen corresponding path program 388 times [2021-06-05 22:04:02,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:02,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401375442] [2021-06-05 22:04:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:02,920 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 22:04:02,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:02,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401375442] [2021-06-05 22:04:02,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401375442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:02,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339242784] [2021-06-05 22:04:02,920 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 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 22:04:03,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:03,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:03,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:03,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339242784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:03,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:03,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:03,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564941734] [2021-06-05 22:04:03,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:03,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:03,140 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 22:04:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:03,457 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2021-06-05 22:04:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:03,458 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 22:04:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:03,458 INFO L225 Difference]: With dead ends: 375 [2021-06-05 22:04:03,458 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 22:04:03,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 22:04:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2021-06-05 22:04:03,470 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 22:04:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-06-05 22:04:03,471 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-06-05 22:04:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:03,471 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-06-05 22:04:03,471 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 22:04:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-06-05 22:04:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:03,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:03,472 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:03,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:03,677 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash -418872303, now seen corresponding path program 389 times [2021-06-05 22:04:03,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:03,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712922587] [2021-06-05 22:04:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:03,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:03,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712922587] [2021-06-05 22:04:03,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712922587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:03,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739937169] [2021-06-05 22:04:03,733 INFO L93 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 22:04:03,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:03,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:03,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739937169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:03,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:03,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:03,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927331034] [2021-06-05 22:04:03,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:03,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:03,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:03,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:03,963 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 22:04:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:04,349 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2021-06-05 22:04:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:04,350 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 22:04:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:04,350 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:04:04,350 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:04:04,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:04:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-06-05 22:04:04,353 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 22:04:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 22:04:04,353 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-06-05 22:04:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:04,353 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 22:04:04,353 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 22:04:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 22:04:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:04,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:04,354 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:04,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-06-05 22:04:04,554 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:04,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1939210357, now seen corresponding path program 390 times [2021-06-05 22:04:04,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:04,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181307512] [2021-06-05 22:04:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:04,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:04,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181307512] [2021-06-05 22:04:04,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181307512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:04,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433368214] [2021-06-05 22:04:04,624 INFO L93 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 22:04:04,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:04,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:04,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:04,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:04,840 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 22:04:04,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433368214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:04,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:04,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:04,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651402531] [2021-06-05 22:04:04,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:04,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:04,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:04,841 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 22:04:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:05,140 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2021-06-05 22:04:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:05,140 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 22:04:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:05,141 INFO L225 Difference]: With dead ends: 456 [2021-06-05 22:04:05,141 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 22:04:05,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 22:04:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2021-06-05 22:04:05,144 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 22:04:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2021-06-05 22:04:05,144 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2021-06-05 22:04:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:05,144 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2021-06-05 22:04:05,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2021-06-05 22:04:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:05,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:05,145 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:05,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 22:04:05,345 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 861849217, now seen corresponding path program 391 times [2021-06-05 22:04:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:05,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877974446] [2021-06-05 22:04:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:05,414 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 22:04:05,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:05,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877974446] [2021-06-05 22:04:05,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877974446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:05,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890791798] [2021-06-05 22:04:05,414 INFO 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 22:04:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:05,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890791798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:05,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:05,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:05,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629535776] [2021-06-05 22:04:05,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:05,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:05,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:05,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:05,633 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 22:04:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:05,922 INFO L93 Difference]: Finished difference Result 462 states and 1279 transitions. [2021-06-05 22:04:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:05,922 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 22:04:05,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:05,923 INFO L225 Difference]: With dead ends: 462 [2021-06-05 22:04:05,923 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 22:04:05,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 22:04:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-06-05 22:04:05,926 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 22:04:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 22:04:05,926 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 22:04:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:05,927 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 22:04:05,927 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 22:04:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 22:04:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:05,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:05,927 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:06,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3568,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:06,127 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:06,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1187809919, now seen corresponding path program 392 times [2021-06-05 22:04:06,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:06,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720192713] [2021-06-05 22:04:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:06,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720192713] [2021-06-05 22:04:06,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720192713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391385768] [2021-06-05 22:04:06,199 INFO L93 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 22:04:06,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:06,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:06,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:06,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:06,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391385768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:06,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:06,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479174576] [2021-06-05 22:04:06,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:06,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:06,450 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 22:04:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:06,696 INFO L93 Difference]: Finished difference Result 424 states and 1199 transitions. [2021-06-05 22:04:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:06,697 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 22:04:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:06,697 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:04:06,697 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 22:04:06,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 22:04:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 295. [2021-06-05 22:04:06,700 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 22:04:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2021-06-05 22:04:06,701 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2021-06-05 22:04:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:06,701 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2021-06-05 22:04:06,701 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 22:04:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2021-06-05 22:04:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:06,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:06,701 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:06,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:06,917 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash 104532481, now seen corresponding path program 393 times [2021-06-05 22:04:06,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:06,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947018271] [2021-06-05 22:04:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:06,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:06,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947018271] [2021-06-05 22:04:06,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947018271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:06,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687930594] [2021-06-05 22:04:06,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:07,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:07,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687930594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:07,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:07,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:07,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616263514] [2021-06-05 22:04:07,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:07,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:07,209 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 22:04:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:07,502 INFO L93 Difference]: Finished difference Result 387 states and 1117 transitions. [2021-06-05 22:04:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:07,502 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 22:04:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:07,503 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:04:07,503 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 22:04:07,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 22:04:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 292. [2021-06-05 22:04:07,506 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 22:04:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2021-06-05 22:04:07,506 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2021-06-05 22:04:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:07,506 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2021-06-05 22:04:07,506 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 22:04:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2021-06-05 22:04:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:07,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:07,507 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:07,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:07,707 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1167073391, now seen corresponding path program 394 times [2021-06-05 22:04:07,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:07,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458917138] [2021-06-05 22:04:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:07,774 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 22:04:07,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:07,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458917138] [2021-06-05 22:04:07,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458917138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:07,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287428023] [2021-06-05 22:04:07,775 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 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 22:04:07,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:07,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:07,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:08,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287428023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:08,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:08,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:08,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592597673] [2021-06-05 22:04:08,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:08,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:08,005 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 22:04:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:08,279 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2021-06-05 22:04:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:08,279 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 22:04:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:08,280 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:04:08,280 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 22:04:08,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 22:04:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2021-06-05 22:04:08,283 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 22:04:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2021-06-05 22:04:08,283 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2021-06-05 22:04:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:08,283 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2021-06-05 22:04:08,284 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 22:04:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2021-06-05 22:04:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:08,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:08,284 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:08,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 22:04:08,484 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1212469979, now seen corresponding path program 395 times [2021-06-05 22:04:08,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:08,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121380329] [2021-06-05 22:04:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:08,553 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 22:04:08,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121380329] [2021-06-05 22:04:08,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121380329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551448751] [2021-06-05 22:04:08,553 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 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 22:04:08,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:08,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:08,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551448751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:08,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:08,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590284223] [2021-06-05 22:04:08,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:08,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:08,781 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 22:04:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:09,083 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2021-06-05 22:04:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:09,083 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 22:04:09,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:09,084 INFO L225 Difference]: With dead ends: 401 [2021-06-05 22:04:09,084 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:04:09,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:09,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:04:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2021-06-05 22:04:09,087 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 22:04:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 22:04:09,087 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-06-05 22:04:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:09,087 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 22:04:09,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 22:04:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:09,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:09,088 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:09,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:09,288 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1109036289, now seen corresponding path program 396 times [2021-06-05 22:04:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:09,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608733059] [2021-06-05 22:04:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:09,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608733059] [2021-06-05 22:04:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608733059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441153792] [2021-06-05 22:04:09,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:09,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:09,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:09,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441153792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:09,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:09,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:09,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573690197] [2021-06-05 22:04:09,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:09,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:09,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:09,578 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 22:04:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:09,980 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2021-06-05 22:04:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:09,980 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 22:04:09,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:09,980 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:04:09,980 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:04:09,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:04:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2021-06-05 22:04:09,983 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 22:04:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2021-06-05 22:04:09,983 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2021-06-05 22:04:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:09,983 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2021-06-05 22:04:09,984 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 22:04:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2021-06-05 22:04:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:09,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:09,984 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:10,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-06-05 22:04:10,184 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1860436727, now seen corresponding path program 397 times [2021-06-05 22:04:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:10,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887705113] [2021-06-05 22:04:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:10,251 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 22:04:10,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:10,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887705113] [2021-06-05 22:04:10,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887705113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:10,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82442445] [2021-06-05 22:04:10,251 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 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 22:04:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:10,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:10,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82442445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:10,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:10,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:10,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847232370] [2021-06-05 22:04:10,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:10,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:10,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:10,516 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 22:04:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:10,887 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2021-06-05 22:04:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:10,887 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 22:04:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:10,887 INFO L225 Difference]: With dead ends: 366 [2021-06-05 22:04:10,888 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 22:04:10,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:04:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 22:04:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2021-06-05 22:04:10,890 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 22:04:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2021-06-05 22:04:10,891 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2021-06-05 22:04:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:10,891 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2021-06-05 22:04:10,891 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 22:04:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2021-06-05 22:04:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:10,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:10,891 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:11,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:11,092 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash -54987199, now seen corresponding path program 398 times [2021-06-05 22:04:11,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:11,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447364340] [2021-06-05 22:04:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:11,158 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 22:04:11,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:11,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447364340] [2021-06-05 22:04:11,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447364340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:11,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296963065] [2021-06-05 22:04:11,158 INFO L93 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 22:04:11,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:11,394 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 22:04:11,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296963065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:11,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:11,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:11,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511301029] [2021-06-05 22:04:11,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:11,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:11,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:11,395 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 22:04:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:11,713 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2021-06-05 22:04:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:11,714 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 22:04:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:11,714 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:04:11,714 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 22:04:11,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 22:04:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2021-06-05 22:04:11,717 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 22:04:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 22:04:11,717 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 22:04:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:11,717 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 22:04:11,717 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 22:04:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 22:04:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:11,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:11,718 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:11,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:11,918 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1294978849, now seen corresponding path program 399 times [2021-06-05 22:04:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:11,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687077004] [2021-06-05 22:04:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:11,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:11,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687077004] [2021-06-05 22:04:11,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687077004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:11,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120588479] [2021-06-05 22:04:11,981 INFO L93 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 22:04:12,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:12,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:12,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120588479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:12,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:12,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566214468] [2021-06-05 22:04:12,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:12,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:12,208 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 22:04:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:12,403 INFO L93 Difference]: Finished difference Result 414 states and 1189 transitions. [2021-06-05 22:04:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:12,404 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 22:04:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:12,404 INFO L225 Difference]: With dead ends: 414 [2021-06-05 22:04:12,404 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:04:12,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:04:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2021-06-05 22:04:12,407 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 22:04:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2021-06-05 22:04:12,408 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2021-06-05 22:04:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:12,408 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2021-06-05 22:04:12,408 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 22:04:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2021-06-05 22:04:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:12,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:12,408 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:12,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:12,609 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -198928873, now seen corresponding path program 400 times [2021-06-05 22:04:12,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:12,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249964651] [2021-06-05 22:04:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:12,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249964651] [2021-06-05 22:04:12,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249964651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786461647] [2021-06-05 22:04:12,669 INFO L93 rtionOrderModulation]: Changing 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 22:04:12,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:12,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:12,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:12,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786461647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:12,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:12,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:12,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142918778] [2021-06-05 22:04:12,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:12,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:12,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:12,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:12,888 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 22:04:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:13,107 INFO L93 Difference]: Finished difference Result 420 states and 1190 transitions. [2021-06-05 22:04:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:13,107 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 22:04:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:13,108 INFO L225 Difference]: With dead ends: 420 [2021-06-05 22:04:13,108 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:04:13,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:04:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 303. [2021-06-05 22:04:13,111 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 22:04:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 22:04:13,111 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 22:04:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:13,111 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 22:04:13,111 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 22:04:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 22:04:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:13,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:13,112 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:13,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3652,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:13,312 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2046379287, now seen corresponding path program 401 times [2021-06-05 22:04:13,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:13,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542958929] [2021-06-05 22:04:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:13,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:13,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542958929] [2021-06-05 22:04:13,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542958929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:13,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011371929] [2021-06-05 22:04:13,377 INFO L93 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 22:04:13,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:13,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:13,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011371929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:13,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:13,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:13,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629219675] [2021-06-05 22:04:13,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:13,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:13,580 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 22:04:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:13,896 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2021-06-05 22:04:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:13,896 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 22:04:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:13,897 INFO L225 Difference]: With dead ends: 472 [2021-06-05 22:04:13,897 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 22:04:13,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 22:04:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2021-06-05 22:04:13,900 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 22:04:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2021-06-05 22:04:13,900 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2021-06-05 22:04:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:13,901 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2021-06-05 22:04:13,901 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 22:04:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2021-06-05 22:04:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:13,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:13,901 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:14,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3661 [2021-06-05 22:04:14,101 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:14,102 INFO L82 PathProgramCache]: Analyzing trace with hash -956245609, now seen corresponding path program 402 times [2021-06-05 22:04:14,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:14,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185919878] [2021-06-05 22:04:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:14,165 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 22:04:14,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:14,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185919878] [2021-06-05 22:04:14,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185919878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:14,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318509067] [2021-06-05 22:04:14,165 INFO L93 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 22:04:14,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:14,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:14,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:14,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318509067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:14,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:14,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:14,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990669969] [2021-06-05 22:04:14,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:14,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:14,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:14,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:14,371 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 22:04:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:14,681 INFO L93 Difference]: Finished difference Result 435 states and 1250 transitions. [2021-06-05 22:04:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:14,681 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 22:04:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:14,681 INFO L225 Difference]: With dead ends: 435 [2021-06-05 22:04:14,681 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 22:04:14,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 22:04:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 303. [2021-06-05 22:04:14,685 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 22:04:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 22:04:14,685 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 22:04:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:14,685 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 22:04:14,685 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 22:04:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 22:04:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:14,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:14,685 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:14,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3671 [2021-06-05 22:04:14,886 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:14,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:14,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2067115815, now seen corresponding path program 403 times [2021-06-05 22:04:14,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:14,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77077189] [2021-06-05 22:04:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:14,946 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 22:04:14,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:14,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77077189] [2021-06-05 22:04:14,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77077189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:14,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991675810] [2021-06-05 22:04:14,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:15,189 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 22:04:15,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991675810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:15,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:15,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:15,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545505289] [2021-06-05 22:04:15,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:15,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:15,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:15,190 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 22:04:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:15,497 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2021-06-05 22:04:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:15,497 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 22:04:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:15,498 INFO L225 Difference]: With dead ends: 460 [2021-06-05 22:04:15,498 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 22:04:15,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 22:04:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2021-06-05 22:04:15,501 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 22:04:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2021-06-05 22:04:15,501 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2021-06-05 22:04:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:15,501 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2021-06-05 22:04:15,501 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 22:04:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2021-06-05 22:04:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:15,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:15,502 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:15,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-06-05 22:04:15,705 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash 151691889, now seen corresponding path program 404 times [2021-06-05 22:04:15,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:15,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513699112] [2021-06-05 22:04:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:15,768 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 22:04:15,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513699112] [2021-06-05 22:04:15,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513699112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399548226] [2021-06-05 22:04:15,768 INFO L93 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 22:04:15,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:15,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:15,985 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 22:04:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399548226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:15,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:15,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038020481] [2021-06-05 22:04:15,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:15,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:15,986 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 22:04:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:16,285 INFO L93 Difference]: Finished difference Result 443 states and 1266 transitions. [2021-06-05 22:04:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:16,286 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 22:04:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:16,286 INFO L225 Difference]: With dead ends: 443 [2021-06-05 22:04:16,286 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 22:04:16,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 22:04:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 304. [2021-06-05 22:04:16,289 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 22:04:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2021-06-05 22:04:16,290 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2021-06-05 22:04:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:16,290 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2021-06-05 22:04:16,290 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 22:04:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2021-06-05 22:04:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:16,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:16,290 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:16,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-05 22:04:16,491 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash -66049343, now seen corresponding path program 405 times [2021-06-05 22:04:16,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:16,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746027507] [2021-06-05 22:04:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:16,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:16,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746027507] [2021-06-05 22:04:16,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746027507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:16,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527665367] [2021-06-05 22:04:16,556 INFO L93 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 22:04:16,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:16,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527665367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:16,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:16,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:16,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740586494] [2021-06-05 22:04:16,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:16,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:16,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:16,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:16,767 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 22:04:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:16,970 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2021-06-05 22:04:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:16,970 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 22:04:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:16,971 INFO L225 Difference]: With dead ends: 396 [2021-06-05 22:04:16,971 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:04:16,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:04:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2021-06-05 22:04:16,974 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 22:04:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2021-06-05 22:04:16,974 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2021-06-05 22:04:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:16,974 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2021-06-05 22:04:16,974 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 22:04:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2021-06-05 22:04:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:16,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:16,975 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:17,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:17,175 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1226293057, now seen corresponding path program 406 times [2021-06-05 22:04:17,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:17,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311467371] [2021-06-05 22:04:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:17,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:17,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311467371] [2021-06-05 22:04:17,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311467371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:17,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136961475] [2021-06-05 22:04:17,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:17,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:17,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:17,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136961475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:17,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:17,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:17,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579209951] [2021-06-05 22:04:17,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:17,507 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 22:04:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:17,751 INFO L93 Difference]: Finished difference Result 384 states and 1117 transitions. [2021-06-05 22:04:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:17,752 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 22:04:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:17,752 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:04:17,752 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 22:04:17,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 22:04:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 294. [2021-06-05 22:04:17,755 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 22:04:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-06-05 22:04:17,755 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-06-05 22:04:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:17,756 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-06-05 22:04:17,756 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 22:04:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-06-05 22:04:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:17,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:17,756 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:17,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-06-05 22:04:17,956 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash -669571979, now seen corresponding path program 407 times [2021-06-05 22:04:17,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:17,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320780391] [2021-06-05 22:04:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:18,027 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 22:04:18,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:18,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320780391] [2021-06-05 22:04:18,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320780391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:18,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904528223] [2021-06-05 22:04:18,027 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 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 22:04:18,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:18,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:18,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:18,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904528223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:18,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:18,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:18,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995911003] [2021-06-05 22:04:18,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:18,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:18,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:18,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:18,235 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 22:04:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:18,471 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-06-05 22:04:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:18,472 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 22:04:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:18,472 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:04:18,472 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:04:18,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:04:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-06-05 22:04:18,476 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 22:04:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-06-05 22:04:18,477 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2021-06-05 22:04:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:18,477 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-06-05 22:04:18,477 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 22:04:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-06-05 22:04:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:18,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:18,477 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:18,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3719 [2021-06-05 22:04:18,700 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1312769993, now seen corresponding path program 408 times [2021-06-05 22:04:18,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:18,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124745508] [2021-06-05 22:04:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:18,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:18,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124745508] [2021-06-05 22:04:18,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124745508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:18,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047335935] [2021-06-05 22:04:18,760 INFO L93 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 22:04:18,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:04:18,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:18,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:18,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047335935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:18,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:18,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:18,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475141010] [2021-06-05 22:04:18,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:18,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:18,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:18,963 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 22:04:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:19,176 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2021-06-05 22:04:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:19,177 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 22:04:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:19,177 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:04:19,177 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:04:19,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:04:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2021-06-05 22:04:19,180 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 22:04:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2021-06-05 22:04:19,180 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2021-06-05 22:04:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:19,181 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2021-06-05 22:04:19,181 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 22:04:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2021-06-05 22:04:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:19,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:19,181 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:19,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3724,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:19,381 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:19,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1066773377, now seen corresponding path program 409 times [2021-06-05 22:04:19,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:19,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094703416] [2021-06-05 22:04:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:19,442 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 22:04:19,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094703416] [2021-06-05 22:04:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094703416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740856244] [2021-06-05 22:04:19,442 INFO 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 22:04:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:19,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:19,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740856244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:19,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:19,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:19,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860145387] [2021-06-05 22:04:19,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:19,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:19,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:19,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:19,644 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 22:04:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:19,897 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2021-06-05 22:04:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:19,898 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 22:04:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:19,898 INFO L225 Difference]: With dead ends: 390 [2021-06-05 22:04:19,898 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 22:04:19,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 22:04:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2021-06-05 22:04:19,901 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 22:04:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2021-06-05 22:04:19,901 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2021-06-05 22:04:19,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:19,902 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2021-06-05 22:04:19,902 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 22:04:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2021-06-05 22:04:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:19,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:19,902 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:20,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-06-05 22:04:20,102 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2107009175, now seen corresponding path program 410 times [2021-06-05 22:04:20,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:20,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969445050] [2021-06-05 22:04:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:20,163 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 22:04:20,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:20,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969445050] [2021-06-05 22:04:20,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969445050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:20,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71114511] [2021-06-05 22:04:20,163 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 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 22:04:20,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:20,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:20,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71114511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:20,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:20,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:20,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853274905] [2021-06-05 22:04:20,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:20,381 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 22:04:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:20,599 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2021-06-05 22:04:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:20,599 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 22:04:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:20,600 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:04:20,600 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:04:20,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:04:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2021-06-05 22:04:20,602 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 22:04:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 22:04:20,603 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 22:04:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:20,603 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 22:04:20,603 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 22:04:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 22:04:20,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:20,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:20,603 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:20,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:20,804 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash -588208655, now seen corresponding path program 411 times [2021-06-05 22:04:20,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:20,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942616507] [2021-06-05 22:04:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:20,854 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 22:04:20,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:20,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942616507] [2021-06-05 22:04:20,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942616507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:20,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839916346] [2021-06-05 22:04:20,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:20,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:20,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:21,053 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 22:04:21,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839916346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:21,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:21,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:21,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540007374] [2021-06-05 22:04:21,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:21,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:21,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:21,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:21,054 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 22:04:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:21,336 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2021-06-05 22:04:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:21,336 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 22:04:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:21,336 INFO L225 Difference]: With dead ends: 331 [2021-06-05 22:04:21,337 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 22:04:21,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 22:04:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-06-05 22:04:21,339 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 22:04:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 22:04:21,339 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 22:04:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:21,339 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 22:04:21,339 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 22:04:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 22:04:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:21,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:21,340 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:21,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3753 [2021-06-05 22:04:21,540 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash 163191783, now seen corresponding path program 412 times [2021-06-05 22:04:21,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:21,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622158682] [2021-06-05 22:04:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:21,592 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 22:04:21,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622158682] [2021-06-05 22:04:21,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622158682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575438323] [2021-06-05 22:04:21,592 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 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 22:04:21,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:21,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:21,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:21,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:21,794 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 22:04:21,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575438323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:21,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:21,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:21,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132559003] [2021-06-05 22:04:21,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:21,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:21,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:21,795 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 22:04:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:22,068 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2021-06-05 22:04:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:22,068 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 22:04:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:22,068 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:04:22,069 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 22:04:22,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 22:04:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2021-06-05 22:04:22,071 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 22:04:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2021-06-05 22:04:22,072 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2021-06-05 22:04:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:22,072 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2021-06-05 22:04:22,072 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 22:04:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2021-06-05 22:04:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:22,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:22,072 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:22,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3760 [2021-06-05 22:04:22,273 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1752232143, now seen corresponding path program 413 times [2021-06-05 22:04:22,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:22,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299160513] [2021-06-05 22:04:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:22,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299160513] [2021-06-05 22:04:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299160513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738892354] [2021-06-05 22:04:22,327 INFO L93 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 22:04:22,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:22,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:22,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:22,522 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 22:04:22,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738892354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:22,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:22,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:22,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218996148] [2021-06-05 22:04:22,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:22,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:22,523 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 22:04:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:22,771 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-06-05 22:04:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:22,771 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 22:04:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:22,771 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:04:22,771 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:04:22,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:04:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2021-06-05 22:04:22,774 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 22:04:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 22:04:22,774 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 22:04:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:22,774 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 22:04:22,774 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 22:04:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 22:04:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:22,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:22,775 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:22,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:22,975 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1949236847, now seen corresponding path program 414 times [2021-06-05 22:04:22,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498120220] [2021-06-05 22:04:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:23,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498120220] [2021-06-05 22:04:23,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498120220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51543064] [2021-06-05 22:04:23,028 INFO L93 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 22:04:23,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:04:23,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51543064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:23,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:23,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363062250] [2021-06-05 22:04:23,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:23,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:23,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:23,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:23,211 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 22:04:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:23,392 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2021-06-05 22:04:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:23,392 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 22:04:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:23,392 INFO L225 Difference]: With dead ends: 362 [2021-06-05 22:04:23,392 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 22:04:23,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 22:04:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2021-06-05 22:04:23,395 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 22:04:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2021-06-05 22:04:23,396 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2021-06-05 22:04:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:23,396 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2021-06-05 22:04:23,396 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 22:04:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2021-06-05 22:04:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:23,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:23,396 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:23,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:23,597 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 430306523, now seen corresponding path program 415 times [2021-06-05 22:04:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:23,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136399303] [2021-06-05 22:04:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:23,651 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 22:04:23,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:23,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136399303] [2021-06-05 22:04:23,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136399303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336711327] [2021-06-05 22:04:23,651 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 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 22:04:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:23,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336711327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:23,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:23,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139015519] [2021-06-05 22:04:23,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:23,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:23,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:23,833 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 22:04:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:24,035 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2021-06-05 22:04:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:24,035 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 22:04:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:24,036 INFO L225 Difference]: With dead ends: 362 [2021-06-05 22:04:24,036 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 22:04:24,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 22:04:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2021-06-05 22:04:24,039 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 22:04:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-06-05 22:04:24,039 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2021-06-05 22:04:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:24,039 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-06-05 22:04:24,039 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 22:04:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-06-05 22:04:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:24,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:24,040 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:24,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:24,240 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:24,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1470542321, now seen corresponding path program 416 times [2021-06-05 22:04:24,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:24,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764887633] [2021-06-05 22:04:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:24,293 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 22:04:24,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764887633] [2021-06-05 22:04:24,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764887633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342422579] [2021-06-05 22:04:24,294 INFO L93 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 22:04:24,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:24,482 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 22:04:24,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342422579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:24,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:24,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:24,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889095488] [2021-06-05 22:04:24,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:24,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:24,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:24,483 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 22:04:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:24,674 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2021-06-05 22:04:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:24,674 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 22:04:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:24,675 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:04:24,675 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 22:04:24,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 22:04:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2021-06-05 22:04:24,677 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 22:04:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-06-05 22:04:24,678 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-06-05 22:04:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:24,678 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-06-05 22:04:24,678 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 22:04:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-06-05 22:04:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:24,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:24,678 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:24,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-06-05 22:04:24,879 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash 488739565, now seen corresponding path program 417 times [2021-06-05 22:04:24,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:24,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110930756] [2021-06-05 22:04:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:24,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:24,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110930756] [2021-06-05 22:04:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110930756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182188091] [2021-06-05 22:04:24,956 INFO L93 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 22:04:25,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:25,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:25,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:25,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182188091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:25,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:25,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:25,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151743056] [2021-06-05 22:04:25,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:25,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:25,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:25,216 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 22:04:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:25,464 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2021-06-05 22:04:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:25,464 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 22:04:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:25,465 INFO L225 Difference]: With dead ends: 514 [2021-06-05 22:04:25,465 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 22:04:25,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 22:04:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 301. [2021-06-05 22:04:25,468 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 22:04:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2021-06-05 22:04:25,469 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2021-06-05 22:04:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:25,469 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2021-06-05 22:04:25,469 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 22:04:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2021-06-05 22:04:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:25,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:25,469 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:25,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:25,670 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1005168157, now seen corresponding path program 418 times [2021-06-05 22:04:25,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:25,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553850184] [2021-06-05 22:04:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:25,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:25,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553850184] [2021-06-05 22:04:25,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553850184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:25,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748356507] [2021-06-05 22:04:25,732 INFO L93 rtionOrderModulation]: Changing 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 22:04:25,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:25,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:25,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748356507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:25,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:25,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:25,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623669574] [2021-06-05 22:04:25,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:25,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:25,938 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 22:04:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:26,111 INFO L93 Difference]: Finished difference Result 520 states and 1480 transitions. [2021-06-05 22:04:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:26,111 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 22:04:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:26,112 INFO L225 Difference]: With dead ends: 520 [2021-06-05 22:04:26,112 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 22:04:26,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 22:04:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 304. [2021-06-05 22:04:26,115 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 22:04:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-06-05 22:04:26,115 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-06-05 22:04:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:26,115 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-06-05 22:04:26,115 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 22:04:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-06-05 22:04:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:26,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:26,116 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:26,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-06-05 22:04:26,316 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1240140003, now seen corresponding path program 419 times [2021-06-05 22:04:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:26,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425625986] [2021-06-05 22:04:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:26,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:26,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425625986] [2021-06-05 22:04:26,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425625986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:26,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663679706] [2021-06-05 22:04:26,386 INFO L93 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 22:04:26,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:26,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:26,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663679706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:26,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:26,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:26,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338033140] [2021-06-05 22:04:26,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:26,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:26,610 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 22:04:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:26,971 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2021-06-05 22:04:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:26,971 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 22:04:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:26,972 INFO L225 Difference]: With dead ends: 572 [2021-06-05 22:04:26,972 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 22:04:26,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 22:04:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2021-06-05 22:04:26,976 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 22:04:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2021-06-05 22:04:26,976 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2021-06-05 22:04:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:26,976 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2021-06-05 22:04:26,976 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 22:04:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2021-06-05 22:04:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:26,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:26,977 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:27,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:27,177 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1762484893, now seen corresponding path program 420 times [2021-06-05 22:04:27,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:27,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444686745] [2021-06-05 22:04:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:27,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:27,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444686745] [2021-06-05 22:04:27,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444686745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:27,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21984232] [2021-06-05 22:04:27,244 INFO L93 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 22:04:27,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:27,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21984232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:27,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:27,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496973974] [2021-06-05 22:04:27,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:27,471 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 22:04:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:27,816 INFO L93 Difference]: Finished difference Result 535 states and 1540 transitions. [2021-06-05 22:04:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:27,817 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 22:04:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:27,817 INFO L225 Difference]: With dead ends: 535 [2021-06-05 22:04:27,817 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 22:04:27,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 22:04:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 304. [2021-06-05 22:04:27,821 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 22:04:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-06-05 22:04:27,821 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-06-05 22:04:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:27,821 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-06-05 22:04:27,821 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 22:04:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-06-05 22:04:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:27,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:27,822 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:28,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3813 [2021-06-05 22:04:28,022 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1260876531, now seen corresponding path program 421 times [2021-06-05 22:04:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:28,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717656077] [2021-06-05 22:04:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:28,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:28,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717656077] [2021-06-05 22:04:28,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717656077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:28,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544691290] [2021-06-05 22:04:28,085 INFO 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 22:04:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:28,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:28,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:28,289 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 22:04:28,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544691290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:28,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:28,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:28,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950688408] [2021-06-05 22:04:28,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:28,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:28,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:28,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:28,289 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 22:04:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:28,641 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2021-06-05 22:04:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:28,642 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 22:04:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:28,642 INFO L225 Difference]: With dead ends: 560 [2021-06-05 22:04:28,642 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 22:04:28,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 22:04:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-06-05 22:04:28,646 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 22:04:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2021-06-05 22:04:28,646 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2021-06-05 22:04:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:28,646 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2021-06-05 22:04:28,646 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 22:04:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2021-06-05 22:04:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:28,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:28,647 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:28,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:28,847 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -654547395, now seen corresponding path program 422 times [2021-06-05 22:04:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:28,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909062248] [2021-06-05 22:04:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:28,923 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 22:04:28,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909062248] [2021-06-05 22:04:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909062248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311721381] [2021-06-05 22:04:28,923 INFO L93 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 22:04:29,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:29,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:29,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311721381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:29,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:29,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136905344] [2021-06-05 22:04:29,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:29,144 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 22:04:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:29,504 INFO L93 Difference]: Finished difference Result 543 states and 1556 transitions. [2021-06-05 22:04:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:29,505 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 22:04:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:29,505 INFO L225 Difference]: With dead ends: 543 [2021-06-05 22:04:29,505 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 22:04:29,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 22:04:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 305. [2021-06-05 22:04:29,509 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 22:04:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-06-05 22:04:29,509 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-06-05 22:04:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:29,509 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-06-05 22:04:29,509 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 22:04:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-06-05 22:04:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:29,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:29,510 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:29,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3832,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:29,710 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash -872288627, now seen corresponding path program 423 times [2021-06-05 22:04:29,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:29,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951796046] [2021-06-05 22:04:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:29,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:29,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951796046] [2021-06-05 22:04:29,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951796046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:29,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750461464] [2021-06-05 22:04:29,778 INFO L93 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 22:04:29,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:29,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:29,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750461464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:29,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:29,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718551801] [2021-06-05 22:04:29,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:29,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:29,983 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 22:04:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:30,217 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2021-06-05 22:04:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:30,218 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 22:04:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:30,218 INFO L225 Difference]: With dead ends: 517 [2021-06-05 22:04:30,218 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 22:04:30,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 22:04:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-06-05 22:04:30,222 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 22:04:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2021-06-05 22:04:30,222 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2021-06-05 22:04:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:30,222 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2021-06-05 22:04:30,222 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 22:04:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2021-06-05 22:04:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:30,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:30,223 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:30,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3842,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:30,423 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:30,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:30,423 INFO L82 PathProgramCache]: Analyzing trace with hash 420053773, now seen corresponding path program 424 times [2021-06-05 22:04:30,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:30,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853164408] [2021-06-05 22:04:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:30,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:30,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853164408] [2021-06-05 22:04:30,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853164408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:30,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435129817] [2021-06-05 22:04:30,490 INFO L93 rtionOrderModulation]: Changing 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 22:04:30,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:30,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:30,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435129817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:30,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:30,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:30,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024851622] [2021-06-05 22:04:30,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:30,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:30,699 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 22:04:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:30,966 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-06-05 22:04:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:30,967 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 22:04:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:30,967 INFO L225 Difference]: With dead ends: 505 [2021-06-05 22:04:30,967 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 22:04:30,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 22:04:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 308. [2021-06-05 22:04:30,971 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 22:04:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-06-05 22:04:30,971 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-06-05 22:04:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:30,971 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-06-05 22:04:30,971 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 22:04:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-06-05 22:04:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:30,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:30,972 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:31,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3850,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:31,172 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1475811263, now seen corresponding path program 425 times [2021-06-05 22:04:31,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:31,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473010301] [2021-06-05 22:04:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:31,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:31,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473010301] [2021-06-05 22:04:31,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473010301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:31,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978933503] [2021-06-05 22:04:31,251 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 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 22:04:31,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:31,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978933503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:31,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:31,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:31,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606391727] [2021-06-05 22:04:31,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:31,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:31,470 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 22:04:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:31,685 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2021-06-05 22:04:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:31,685 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 22:04:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:31,686 INFO L225 Difference]: With dead ends: 460 [2021-06-05 22:04:31,686 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 22:04:31,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 22:04:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2021-06-05 22:04:31,689 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 22:04:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-06-05 22:04:31,690 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-06-05 22:04:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:31,690 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-06-05 22:04:31,690 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 22:04:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-06-05 22:04:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:31,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:31,690 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:31,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3859,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:31,892 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2119009277, now seen corresponding path program 426 times [2021-06-05 22:04:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:31,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666051961] [2021-06-05 22:04:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:31,952 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 22:04:31,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666051961] [2021-06-05 22:04:31,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666051961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407679817] [2021-06-05 22:04:31,953 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 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 22:04:32,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:04:32,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:32,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407679817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:32,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785620014] [2021-06-05 22:04:32,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:32,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:32,155 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 22:04:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:32,336 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2021-06-05 22:04:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:32,336 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 22:04:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:32,337 INFO L225 Difference]: With dead ends: 499 [2021-06-05 22:04:32,337 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 22:04:32,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 22:04:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2021-06-05 22:04:32,340 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 22:04:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2021-06-05 22:04:32,340 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2021-06-05 22:04:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:32,340 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2021-06-05 22:04:32,340 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 22:04:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2021-06-05 22:04:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:32,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:32,341 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:32,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:32,541 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash 260534093, now seen corresponding path program 427 times [2021-06-05 22:04:32,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:32,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011886762] [2021-06-05 22:04:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:32,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011886762] [2021-06-05 22:04:32,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011886762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124540701] [2021-06-05 22:04:32,605 INFO 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 22:04:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:32,807 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 22:04:32,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124540701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:32,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:32,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435123851] [2021-06-05 22:04:32,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:32,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:32,808 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 22:04:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:33,058 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2021-06-05 22:04:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:33,059 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 22:04:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:33,059 INFO L225 Difference]: With dead ends: 505 [2021-06-05 22:04:33,059 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 22:04:33,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 22:04:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2021-06-05 22:04:33,063 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 22:04:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 22:04:33,063 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 22:04:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:33,063 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 22:04:33,063 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 22:04:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 22:04:33,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:33,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:33,063 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:33,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:33,264 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:33,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1300769891, now seen corresponding path program 428 times [2021-06-05 22:04:33,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:33,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404768155] [2021-06-05 22:04:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:33,337 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 22:04:33,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404768155] [2021-06-05 22:04:33,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404768155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180400939] [2021-06-05 22:04:33,337 INFO L93 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 22:04:33,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:33,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:33,545 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 22:04:33,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180400939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:33,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:33,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:33,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994369178] [2021-06-05 22:04:33,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:33,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:33,545 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 22:04:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:33,761 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2021-06-05 22:04:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:33,761 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 22:04:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:33,762 INFO L225 Difference]: With dead ends: 480 [2021-06-05 22:04:33,762 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 22:04:33,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 22:04:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2021-06-05 22:04:33,765 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 22:04:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-06-05 22:04:33,766 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2021-06-05 22:04:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:33,766 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-06-05 22:04:33,766 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 22:04:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-06-05 22:04:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:33,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:33,766 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:33,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:33,967 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2145222335, now seen corresponding path program 429 times [2021-06-05 22:04:33,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:33,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266168533] [2021-06-05 22:04:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:34,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:34,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266168533] [2021-06-05 22:04:34,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266168533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:34,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569776732] [2021-06-05 22:04:34,030 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 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 22:04:34,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:34,234 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 22:04:34,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569776732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88750782] [2021-06-05 22:04:34,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:34,235 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 22:04:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:34,437 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2021-06-05 22:04:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:34,437 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 22:04:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:34,438 INFO L225 Difference]: With dead ends: 504 [2021-06-05 22:04:34,438 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 22:04:34,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 22:04:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2021-06-05 22:04:34,441 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 22:04:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 22:04:34,442 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 22:04:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:34,442 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 22:04:34,442 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 22:04:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 22:04:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:34,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:34,442 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:34,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:34,643 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash -852879935, now seen corresponding path program 430 times [2021-06-05 22:04:34,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:34,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649617212] [2021-06-05 22:04:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:34,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:34,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649617212] [2021-06-05 22:04:34,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649617212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:34,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735459313] [2021-06-05 22:04:34,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:34,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:34,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:34,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:34,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735459313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:34,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:34,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:34,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061179306] [2021-06-05 22:04:34,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:34,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:34,911 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 22:04:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:35,153 INFO L93 Difference]: Finished difference Result 506 states and 1469 transitions. [2021-06-05 22:04:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:35,154 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 22:04:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:35,154 INFO L225 Difference]: With dead ends: 506 [2021-06-05 22:04:35,154 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 22:04:35,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 22:04:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 306. [2021-06-05 22:04:35,158 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 22:04:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2021-06-05 22:04:35,158 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2021-06-05 22:04:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:35,158 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2021-06-05 22:04:35,158 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 22:04:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2021-06-05 22:04:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:35,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:35,159 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:35,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:35,359 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:35,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1546222325, now seen corresponding path program 431 times [2021-06-05 22:04:35,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:35,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278734579] [2021-06-05 22:04:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:35,420 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 22:04:35,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:35,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278734579] [2021-06-05 22:04:35,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278734579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:35,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197591511] [2021-06-05 22:04:35,420 INFO L93 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 22:04:35,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:35,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:35,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:35,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:35,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197591511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:35,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:35,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:35,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580758733] [2021-06-05 22:04:35,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:35,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:35,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:35,638 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 22:04:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:35,837 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2021-06-05 22:04:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:35,837 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 22:04:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:35,837 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:04:35,838 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:04:35,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:04:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2021-06-05 22:04:35,840 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 22:04:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2021-06-05 22:04:35,841 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2021-06-05 22:04:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:35,841 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2021-06-05 22:04:35,841 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 22:04:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2021-06-05 22:04:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:35,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:35,841 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:36,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:36,042 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1487908445, now seen corresponding path program 432 times [2021-06-05 22:04:36,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:36,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078687262] [2021-06-05 22:04:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:36,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:36,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078687262] [2021-06-05 22:04:36,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078687262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860035755] [2021-06-05 22:04:36,098 INFO L93 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 22:04:36,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:36,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:36,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:36,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860035755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:36,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:36,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656859544] [2021-06-05 22:04:36,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:36,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:36,295 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 22:04:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:36,474 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2021-06-05 22:04:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:36,474 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 22:04:36,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:36,474 INFO L225 Difference]: With dead ends: 474 [2021-06-05 22:04:36,475 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 22:04:36,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 22:04:36,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2021-06-05 22:04:36,478 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 22:04:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 22:04:36,478 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 22:04:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:36,478 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 22:04:36,478 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 22:04:36,478 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 22:04:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:36,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:36,478 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:36,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:36,679 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash 266557457, now seen corresponding path program 433 times [2021-06-05 22:04:36,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:36,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262716453] [2021-06-05 22:04:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:36,735 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 22:04:36,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:36,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262716453] [2021-06-05 22:04:36,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262716453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640955896] [2021-06-05 22:04:36,735 INFO 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 22:04:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:36,920 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 22:04:36,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640955896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:36,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:36,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528700841] [2021-06-05 22:04:36,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:36,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:36,921 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 22:04:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:37,122 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2021-06-05 22:04:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:37,123 INFO L225 Difference]: With dead ends: 539 [2021-06-05 22:04:37,123 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 22:04:37,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 22:04:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2021-06-05 22:04:37,126 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 22:04:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-06-05 22:04:37,127 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-06-05 22:04:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:37,127 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-06-05 22:04:37,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-06-05 22:04:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:37,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:37,127 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:37,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3915,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:37,328 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:37,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1648866469, now seen corresponding path program 434 times [2021-06-05 22:04:37,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:37,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323585633] [2021-06-05 22:04:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:37,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:37,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323585633] [2021-06-05 22:04:37,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323585633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:37,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759400559] [2021-06-05 22:04:37,387 INFO L93 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 22:04:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:37,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:37,591 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 22:04:37,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759400559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:37,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:37,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:37,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112022344] [2021-06-05 22:04:37,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:37,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:37,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:37,591 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 22:04:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:37,868 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2021-06-05 22:04:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:37,868 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 22:04:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:37,869 INFO L225 Difference]: With dead ends: 545 [2021-06-05 22:04:37,869 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 22:04:37,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 22:04:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2021-06-05 22:04:37,872 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 22:04:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2021-06-05 22:04:37,873 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2021-06-05 22:04:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:37,873 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2021-06-05 22:04:37,873 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 22:04:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2021-06-05 22:04:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:37,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:37,873 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:38,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3925,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:38,073 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash -608630671, now seen corresponding path program 435 times [2021-06-05 22:04:38,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:38,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53142731] [2021-06-05 22:04:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:38,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:38,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53142731] [2021-06-05 22:04:38,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53142731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:38,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814779641] [2021-06-05 22:04:38,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:38,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:38,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814779641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:38,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:38,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:04:38,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421807373] [2021-06-05 22:04:38,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:04:38,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:04:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:04:38,339 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 22:04:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:38,536 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2021-06-05 22:04:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:38,536 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 22:04:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:38,537 INFO L225 Difference]: With dead ends: 528 [2021-06-05 22:04:38,537 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 22:04:38,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:04:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 22:04:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2021-06-05 22:04:38,540 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 22:04:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-06-05 22:04:38,541 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2021-06-05 22:04:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:38,541 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-06-05 22:04:38,541 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 22:04:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-06-05 22:04:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:38,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:38,541 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:38,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-05 22:04:38,742 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1151422269, now seen corresponding path program 436 times [2021-06-05 22:04:38,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:38,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617886760] [2021-06-05 22:04:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:38,796 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 22:04:38,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:38,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617886760] [2021-06-05 22:04:38,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617886760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:38,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832412579] [2021-06-05 22:04:38,797 INFO L93 rtionOrderModulation]: Changing 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 22:04:38,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:38,982 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 22:04:38,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832412579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:38,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:38,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706617204] [2021-06-05 22:04:38,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:38,983 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 22:04:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:39,162 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2021-06-05 22:04:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:39,162 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 22:04:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:39,163 INFO L225 Difference]: With dead ends: 553 [2021-06-05 22:04:39,163 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 22:04:39,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 22:04:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-06-05 22:04:39,166 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 22:04:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-06-05 22:04:39,172 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-06-05 22:04:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:39,172 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-06-05 22:04:39,172 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 22:04:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-06-05 22:04:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:39,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:39,172 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:39,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:39,373 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash 349916067, now seen corresponding path program 437 times [2021-06-05 22:04:39,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:39,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604342463] [2021-06-05 22:04:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604342463] [2021-06-05 22:04:39,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604342463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327232907] [2021-06-05 22:04:39,419 INFO L93 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 22:04:39,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:39,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327232907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:39,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:39,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716731754] [2021-06-05 22:04:39,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:39,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:39,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:39,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:39,600 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 22:04:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:39,814 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2021-06-05 22:04:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:39,815 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 22:04:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:39,815 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:04:39,815 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 22:04:39,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 22:04:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2021-06-05 22:04:39,818 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 22:04:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2021-06-05 22:04:39,818 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2021-06-05 22:04:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:39,818 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2021-06-05 22:04:39,818 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 22:04:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2021-06-05 22:04:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:39,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:39,819 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:40,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:40,019 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:40,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:40,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1101316505, now seen corresponding path program 438 times [2021-06-05 22:04:40,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:40,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867519980] [2021-06-05 22:04:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:40,066 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 22:04:40,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:40,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867519980] [2021-06-05 22:04:40,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867519980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:40,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284645464] [2021-06-05 22:04:40,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:40,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:40,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:40,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:40,248 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 22:04:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284645464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:40,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:40,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138549645] [2021-06-05 22:04:40,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:40,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:40,249 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 22:04:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:40,467 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2021-06-05 22:04:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:40,467 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 22:04:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:40,468 INFO L225 Difference]: With dead ends: 353 [2021-06-05 22:04:40,468 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 22:04:40,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 22:04:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2021-06-05 22:04:40,470 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 22:04:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2021-06-05 22:04:40,471 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2021-06-05 22:04:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:40,471 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2021-06-05 22:04:40,471 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 22:04:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2021-06-05 22:04:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:40,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:40,471 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:40,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-06-05 22:04:40,672 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -814107421, now seen corresponding path program 439 times [2021-06-05 22:04:40,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:40,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987721813] [2021-06-05 22:04:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:40,722 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 22:04:40,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:40,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987721813] [2021-06-05 22:04:40,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987721813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:40,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763001022] [2021-06-05 22:04:40,723 INFO 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 22:04:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:40,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763001022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:40,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:40,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:40,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344552075] [2021-06-05 22:04:40,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:40,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:40,914 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 22:04:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:41,089 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2021-06-05 22:04:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:41,089 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 22:04:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:41,090 INFO L225 Difference]: With dead ends: 324 [2021-06-05 22:04:41,090 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 22:04:41,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 22:04:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2021-06-05 22:04:41,092 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 22:04:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2021-06-05 22:04:41,093 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2021-06-05 22:04:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:41,093 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2021-06-05 22:04:41,093 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 22:04:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2021-06-05 22:04:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:41,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:41,093 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:41,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:41,293 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1011112125, now seen corresponding path program 440 times [2021-06-05 22:04:41,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:41,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820127069] [2021-06-05 22:04:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:41,342 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 22:04:41,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:41,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820127069] [2021-06-05 22:04:41,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820127069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:41,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724864897] [2021-06-05 22:04:41,343 INFO L93 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 22:04:41,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:41,510 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 22:04:41,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724864897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:41,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:41,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:41,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015996288] [2021-06-05 22:04:41,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:41,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:41,510 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 22:04:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:41,654 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2021-06-05 22:04:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:41,655 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 22:04:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:41,655 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:04:41,655 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 22:04:41,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 22:04:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2021-06-05 22:04:41,659 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 22:04:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2021-06-05 22:04:41,659 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2021-06-05 22:04:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:41,660 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2021-06-05 22:04:41,660 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 22:04:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2021-06-05 22:04:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:41,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:41,660 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:41,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-05 22:04:41,860 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:41,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1368431245, now seen corresponding path program 441 times [2021-06-05 22:04:41,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:41,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843010172] [2021-06-05 22:04:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:41,910 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 22:04:41,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843010172] [2021-06-05 22:04:41,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843010172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63959749] [2021-06-05 22:04:41,910 INFO L93 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 22:04:42,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:42,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:42,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:42,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:42,081 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 22:04:42,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63959749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:42,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:42,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:42,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539564965] [2021-06-05 22:04:42,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:42,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:42,082 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 22:04:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:42,235 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2021-06-05 22:04:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:42,235 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 22:04:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:42,236 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:04:42,236 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:04:42,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:04:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2021-06-05 22:04:42,239 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 22:04:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2021-06-05 22:04:42,239 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2021-06-05 22:04:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:42,239 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2021-06-05 22:04:42,239 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 22:04:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2021-06-05 22:04:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:42,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:42,240 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:42,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:42,440 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1886300253, now seen corresponding path program 442 times [2021-06-05 22:04:42,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:42,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065092858] [2021-06-05 22:04:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:42,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:42,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065092858] [2021-06-05 22:04:42,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065092858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:42,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390175019] [2021-06-05 22:04:42,496 INFO L93 rtionOrderModulation]: Changing 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 22:04:42,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:42,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390175019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:42,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:42,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:42,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896034748] [2021-06-05 22:04:42,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:42,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:42,662 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 22:04:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:42,791 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2021-06-05 22:04:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:42,791 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 22:04:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:42,791 INFO L225 Difference]: With dead ends: 334 [2021-06-05 22:04:42,791 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 22:04:42,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 22:04:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2021-06-05 22:04:42,794 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 22:04:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-06-05 22:04:42,794 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-06-05 22:04:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:42,794 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-06-05 22:04:42,794 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 22:04:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-06-05 22:04:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:42,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:42,795 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:42,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,445 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:42,995 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2010921463, now seen corresponding path program 443 times [2021-06-05 22:04:42,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:42,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837958755] [2021-06-05 22:04:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:43,044 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 22:04:43,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:43,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837958755] [2021-06-05 22:04:43,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837958755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135949556] [2021-06-05 22:04:43,045 INFO L93 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 22:04:43,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:43,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:43,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135949556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:43,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:43,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921858282] [2021-06-05 22:04:43,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:43,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:43,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:43,212 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 22:04:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:43,364 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2021-06-05 22:04:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:43,364 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 22:04:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:43,365 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:04:43,365 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 22:04:43,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 22:04:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-06-05 22:04:43,369 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 22:04:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2021-06-05 22:04:43,370 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2021-06-05 22:04:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:43,370 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2021-06-05 22:04:43,370 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 22:04:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2021-06-05 22:04:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:43,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:43,370 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:43,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:43,578 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:43,578 INFO L82 PathProgramCache]: Analyzing trace with hash 95497537, now seen corresponding path program 444 times [2021-06-05 22:04:43,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:43,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379489439] [2021-06-05 22:04:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:43,629 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 22:04:43,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:43,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379489439] [2021-06-05 22:04:43,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379489439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530980871] [2021-06-05 22:04:43,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:43,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:04:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:43,795 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 22:04:43,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530980871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:43,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:43,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244187959] [2021-06-05 22:04:43,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:43,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:43,796 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 22:04:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:44,000 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2021-06-05 22:04:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:44,001 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 22:04:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:44,001 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:04:44,001 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 22:04:44,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:04:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 22:04:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2021-06-05 22:04:44,004 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 22:04:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2021-06-05 22:04:44,005 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2021-06-05 22:04:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:44,005 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2021-06-05 22:04:44,005 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 22:04:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2021-06-05 22:04:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:44,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:44,005 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:44,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-05 22:04:44,206 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1135733335, now seen corresponding path program 445 times [2021-06-05 22:04:44,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:44,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189203983] [2021-06-05 22:04:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:44,256 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 22:04:44,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:44,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189203983] [2021-06-05 22:04:44,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189203983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026300950] [2021-06-05 22:04:44,257 INFO 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 22:04:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:44,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:44,428 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 22:04:44,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026300950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:44,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:04:44,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093011230] [2021-06-05 22:04:44,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:04:44,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:04:44,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:04:44,428 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 22:04:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:44,565 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-06-05 22:04:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:44,566 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 22:04:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:44,566 INFO L225 Difference]: With dead ends: 407 [2021-06-05 22:04:44,566 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 22:04:44,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 22:04:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2021-06-05 22:04:44,569 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 22:04:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2021-06-05 22:04:44,578 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2021-06-05 22:04:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:44,578 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2021-06-05 22:04:44,579 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 22:04:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2021-06-05 22:04:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:44,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:44,579 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:44,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:44,799 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1399181021, now seen corresponding path program 446 times [2021-06-05 22:04:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:44,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758437949] [2021-06-05 22:04:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:44,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:44,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758437949] [2021-06-05 22:04:44,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758437949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514541636] [2021-06-05 22:04:44,847 INFO L93 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 22:04:44,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:44,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:44,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:44,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514541636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:44,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:04:44,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28444489] [2021-06-05 22:04:44,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:04:44,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:44,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:04:44,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:04:44,998 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 22:04:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:45,128 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2021-06-05 22:04:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:45,128 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 22:04:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:45,129 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:04:45,129 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:04:45,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:04:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2021-06-05 22:04:45,132 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 22:04:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-06-05 22:04:45,132 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-06-05 22:04:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:45,132 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-06-05 22:04:45,132 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 22:04:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-06-05 22:04:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:45,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:45,132 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:45,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:45,333 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash -817863631, now seen corresponding path program 447 times [2021-06-05 22:04:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:45,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263475380] [2021-06-05 22:04:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:45,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:45,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263475380] [2021-06-05 22:04:45,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263475380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:45,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482662519] [2021-06-05 22:04:45,398 INFO L93 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 22:04:45,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:45,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482662519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:45,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:45,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:45,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060123966] [2021-06-05 22:04:45,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:45,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:45,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:45,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:45,670 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 22:04:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:46,189 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2021-06-05 22:04:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:46,189 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 22:04:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:46,190 INFO L225 Difference]: With dead ends: 592 [2021-06-05 22:04:46,190 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 22:04:46,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 22:04:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2021-06-05 22:04:46,194 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 22:04:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 22:04:46,194 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 22:04:46,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:46,194 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 22:04:46,194 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 22:04:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 22:04:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:46,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:46,195 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:46,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4000,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:46,395 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:46,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1983195943, now seen corresponding path program 448 times [2021-06-05 22:04:46,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:46,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484940294] [2021-06-05 22:04:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:46,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484940294] [2021-06-05 22:04:46,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484940294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377976862] [2021-06-05 22:04:46,458 INFO L93 rtionOrderModulation]: Changing 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 22:04:46,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:46,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:46,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:46,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:46,700 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 22:04:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377976862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:46,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:46,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:46,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671046819] [2021-06-05 22:04:46,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:46,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:46,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:46,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:46,701 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 22:04:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:47,187 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2021-06-05 22:04:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:47,188 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 22:04:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:47,188 INFO L225 Difference]: With dead ends: 598 [2021-06-05 22:04:47,188 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 22:04:47,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:04:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 22:04:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2021-06-05 22:04:47,192 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 22:04:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2021-06-05 22:04:47,192 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2021-06-05 22:04:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:47,192 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2021-06-05 22:04:47,192 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 22:04:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2021-06-05 22:04:47,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:47,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:47,193 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:47,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-05 22:04:47,393 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1773915775, now seen corresponding path program 449 times [2021-06-05 22:04:47,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:47,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178311090] [2021-06-05 22:04:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:47,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:47,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178311090] [2021-06-05 22:04:47,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178311090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:47,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219307208] [2021-06-05 22:04:47,483 INFO L93 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 22:04:47,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:47,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:47,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219307208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:47,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:47,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:47,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690351891] [2021-06-05 22:04:47,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:47,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:47,800 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 22:04:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:48,189 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2021-06-05 22:04:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:48,190 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 22:04:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:48,190 INFO L225 Difference]: With dead ends: 562 [2021-06-05 22:04:48,190 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 22:04:48,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 22:04:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2021-06-05 22:04:48,194 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 22:04:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-06-05 22:04:48,194 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-06-05 22:04:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:48,194 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-06-05 22:04:48,194 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 22:04:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-06-05 22:04:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:48,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:48,195 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:48,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-05 22:04:48,395 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1186170453, now seen corresponding path program 450 times [2021-06-05 22:04:48,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:48,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708540398] [2021-06-05 22:04:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:48,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:48,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708540398] [2021-06-05 22:04:48,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708540398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:48,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747392501] [2021-06-05 22:04:48,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:48,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:48,693 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 22:04:48,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747392501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:48,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:48,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:04:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69177521] [2021-06-05 22:04:48,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:04:48,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:04:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:04:48,694 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 22:04:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:49,054 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2021-06-05 22:04:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:49,054 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 22:04:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:49,055 INFO L225 Difference]: With dead ends: 594 [2021-06-05 22:04:49,055 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 22:04:49,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:04:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 22:04:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2021-06-05 22:04:49,058 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 22:04:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-06-05 22:04:49,059 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-06-05 22:04:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:49,059 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-06-05 22:04:49,059 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 22:04:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-06-05 22:04:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:49,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:49,059 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:49,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-05 22:04:49,260 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:49,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1435633387, now seen corresponding path program 451 times [2021-06-05 22:04:49,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:49,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817106580] [2021-06-05 22:04:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:49,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:49,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817106580] [2021-06-05 22:04:49,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817106580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:49,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605123102] [2021-06-05 22:04:49,327 INFO 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 22:04:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:49,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:49,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605123102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:49,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:49,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:49,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460571231] [2021-06-05 22:04:49,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:49,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:49,611 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 22:04:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:50,018 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2021-06-05 22:04:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:50,018 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 22:04:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:50,019 INFO L225 Difference]: With dead ends: 604 [2021-06-05 22:04:50,019 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 22:04:50,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 22:04:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2021-06-05 22:04:50,022 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 22:04:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2021-06-05 22:04:50,023 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2021-06-05 22:04:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:50,023 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2021-06-05 22:04:50,023 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 22:04:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2021-06-05 22:04:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:50,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:50,023 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:50,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:50,224 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -58274335, now seen corresponding path program 452 times [2021-06-05 22:04:50,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:50,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109092645] [2021-06-05 22:04:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:50,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:50,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109092645] [2021-06-05 22:04:50,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109092645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:50,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555674626] [2021-06-05 22:04:50,289 INFO L93 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 22:04:50,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:50,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555674626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:50,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:50,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:50,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136297357] [2021-06-05 22:04:50,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:50,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:50,550 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 22:04:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:50,979 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2021-06-05 22:04:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:50,979 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 22:04:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:50,979 INFO L225 Difference]: With dead ends: 610 [2021-06-05 22:04:50,980 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 22:04:50,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:04:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 22:04:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2021-06-05 22:04:50,983 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 22:04:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-06-05 22:04:50,983 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-06-05 22:04:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:50,983 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-06-05 22:04:50,983 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 22:04:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-06-05 22:04:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:50,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:50,984 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:51,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:51,184 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash 479581243, now seen corresponding path program 453 times [2021-06-05 22:04:51,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:51,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489849610] [2021-06-05 22:04:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:51,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:51,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489849610] [2021-06-05 22:04:51,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489849610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:51,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571239078] [2021-06-05 22:04:51,247 INFO L93 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 22:04:51,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:51,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:51,512 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 22:04:51,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571239078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:51,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:51,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:51,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713671220] [2021-06-05 22:04:51,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:51,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:51,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:51,512 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 22:04:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:51,872 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2021-06-05 22:04:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:51,872 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 22:04:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:51,873 INFO L225 Difference]: With dead ends: 574 [2021-06-05 22:04:51,873 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 22:04:51,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 22:04:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2021-06-05 22:04:51,876 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 22:04:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-06-05 22:04:51,877 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-06-05 22:04:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:51,877 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-06-05 22:04:51,877 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 22:04:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-06-05 22:04:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:51,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:51,877 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:52,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-05 22:04:52,078 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:52,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:52,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756811, now seen corresponding path program 454 times [2021-06-05 22:04:52,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:52,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79443956] [2021-06-05 22:04:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:52,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79443956] [2021-06-05 22:04:52,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79443956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:52,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554184700] [2021-06-05 22:04:52,146 INFO L93 rtionOrderModulation]: Changing 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 22:04:52,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:52,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:52,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:52,409 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 22:04:52,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554184700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:52,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:52,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:52,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685078793] [2021-06-05 22:04:52,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:52,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:52,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:52,410 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 22:04:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:52,998 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2021-06-05 22:04:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:52,998 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 22:04:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:52,999 INFO L225 Difference]: With dead ends: 682 [2021-06-05 22:04:52,999 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 22:04:52,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 22:04:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2021-06-05 22:04:53,003 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 22:04:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2021-06-05 22:04:53,003 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2021-06-05 22:04:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:53,003 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2021-06-05 22:04:53,003 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 22:04:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2021-06-05 22:04:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:53,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:53,004 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:53,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-05 22:04:53,204 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1760302763, now seen corresponding path program 455 times [2021-06-05 22:04:53,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:53,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528466089] [2021-06-05 22:04:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:53,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528466089] [2021-06-05 22:04:53,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528466089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256287898] [2021-06-05 22:04:53,271 INFO L93 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 22:04:53,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:53,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:53,532 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 22:04:53,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256287898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:53,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:53,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:53,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829100563] [2021-06-05 22:04:53,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:53,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:53,533 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 22:04:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:54,201 INFO L93 Difference]: Finished difference Result 688 states and 1929 transitions. [2021-06-05 22:04:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:54,201 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 22:04:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:54,202 INFO L225 Difference]: With dead ends: 688 [2021-06-05 22:04:54,202 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 22:04:54,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 671.8ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 22:04:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 306. [2021-06-05 22:04:54,206 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 22:04:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2021-06-05 22:04:54,206 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2021-06-05 22:04:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:54,206 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2021-06-05 22:04:54,206 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 22:04:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2021-06-05 22:04:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:54,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:54,207 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:54,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-06-05 22:04:54,407 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -289356373, now seen corresponding path program 456 times [2021-06-05 22:04:54,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:54,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393562132] [2021-06-05 22:04:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:54,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:54,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393562132] [2021-06-05 22:04:54,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393562132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:54,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908848241] [2021-06-05 22:04:54,477 INFO L93 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 22:04:54,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:04:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:54,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:54,751 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 22:04:54,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908848241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:54,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:54,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:54,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869828442] [2021-06-05 22:04:54,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:54,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:54,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:54,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:54,752 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 22:04:55,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:55,127 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2021-06-05 22:04:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:55,127 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 22:04:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:55,128 INFO L225 Difference]: With dead ends: 650 [2021-06-05 22:04:55,128 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 22:04:55,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 22:04:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2021-06-05 22:04:55,132 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 22:04:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2021-06-05 22:04:55,132 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2021-06-05 22:04:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:55,132 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2021-06-05 22:04:55,132 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 22:04:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2021-06-05 22:04:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:55,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:55,133 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:55,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:55,333 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1002986027, now seen corresponding path program 457 times [2021-06-05 22:04:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933487016] [2021-06-05 22:04:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:55,404 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 22:04:55,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:55,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933487016] [2021-06-05 22:04:55,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933487016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:55,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417904648] [2021-06-05 22:04:55,405 INFO 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 22:04:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417904648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:55,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:55,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:55,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372865463] [2021-06-05 22:04:55,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:55,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:55,672 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 22:04:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:56,015 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2021-06-05 22:04:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:56,015 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 22:04:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:56,016 INFO L225 Difference]: With dead ends: 613 [2021-06-05 22:04:56,016 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 22:04:56,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 22:04:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 296. [2021-06-05 22:04:56,019 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 22:04:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2021-06-05 22:04:56,019 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2021-06-05 22:04:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:56,020 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2021-06-05 22:04:56,020 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 22:04:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2021-06-05 22:04:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:56,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:56,020 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:56,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4088,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:56,220 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -268619845, now seen corresponding path program 458 times [2021-06-05 22:04:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:56,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264434502] [2021-06-05 22:04:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:56,287 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 22:04:56,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:56,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264434502] [2021-06-05 22:04:56,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264434502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:56,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883665438] [2021-06-05 22:04:56,288 INFO L93 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 22:04:56,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:56,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:56,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:56,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:56,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883665438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:56,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:56,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:56,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402473831] [2021-06-05 22:04:56,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:56,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:56,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:56,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:56,548 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 22:04:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:57,170 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2021-06-05 22:04:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:57,170 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 22:04:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:57,171 INFO L225 Difference]: With dead ends: 650 [2021-06-05 22:04:57,171 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 22:04:57,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 631.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 22:04:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2021-06-05 22:04:57,175 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 22:04:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2021-06-05 22:04:57,175 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2021-06-05 22:04:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:57,175 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2021-06-05 22:04:57,176 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 22:04:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2021-06-05 22:04:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:57,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:57,176 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:57,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-06-05 22:04:57,376 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2110923525, now seen corresponding path program 459 times [2021-06-05 22:04:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:57,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940713179] [2021-06-05 22:04:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:57,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:57,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940713179] [2021-06-05 22:04:57,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940713179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:57,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592068446] [2021-06-05 22:04:57,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:04:57,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:57,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:57,756 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 22:04:57,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592068446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:57,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:57,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:57,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307977265] [2021-06-05 22:04:57,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:57,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:57,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:57,757 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 22:04:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:58,379 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2021-06-05 22:04:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:58,379 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 22:04:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:58,380 INFO L225 Difference]: With dead ends: 627 [2021-06-05 22:04:58,380 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 22:04:58,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 22:04:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2021-06-05 22:04:58,383 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 22:04:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-06-05 22:04:58,384 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-06-05 22:04:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:58,384 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-06-05 22:04:58,384 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 22:04:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-06-05 22:04:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:58,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:58,384 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:58,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:58,585 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:58,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2007489835, now seen corresponding path program 460 times [2021-06-05 22:04:58,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:58,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898357533] [2021-06-05 22:04:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:58,657 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 22:04:58,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898357533] [2021-06-05 22:04:58,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898357533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814854536] [2021-06-05 22:04:58,657 INFO L93 rtionOrderModulation]: Changing 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 22:04:58,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:58,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:59,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814854536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:59,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:59,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000292589] [2021-06-05 22:04:59,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:59,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:59,033 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 22:04:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:59,438 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2021-06-05 22:04:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:04:59,438 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 22:04:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:59,439 INFO L225 Difference]: With dead ends: 567 [2021-06-05 22:04:59,439 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 22:04:59,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:04:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 22:04:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2021-06-05 22:04:59,442 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 22:04:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2021-06-05 22:04:59,442 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2021-06-05 22:04:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:59,442 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2021-06-05 22:04:59,443 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 22:04:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2021-06-05 22:04:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:59,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:59,443 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:59,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:59,643 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1536077023, now seen corresponding path program 461 times [2021-06-05 22:04:59,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:59,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245690360] [2021-06-05 22:04:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:59,718 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 22:04:59,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:59,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245690360] [2021-06-05 22:04:59,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245690360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:59,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324774482] [2021-06-05 22:04:59,718 INFO L93 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 22:04:59,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:59,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:59,991 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 22:04:59,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324774482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:59,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:59,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:59,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325867397] [2021-06-05 22:04:59,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:59,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:59,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:59,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:59,992 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 22:05:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:00,468 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2021-06-05 22:05:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:00,468 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 22:05:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:00,469 INFO L225 Difference]: With dead ends: 592 [2021-06-05 22:05:00,469 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 22:05:00,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 22:05:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2021-06-05 22:05:00,472 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 22:05:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 22:05:00,473 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 22:05:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:00,473 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 22:05:00,473 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 22:05:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 22:05:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:00,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:00,473 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:00,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4127 [2021-06-05 22:05:00,674 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:00,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash 843466347, now seen corresponding path program 462 times [2021-06-05 22:05:00,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:00,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428862284] [2021-06-05 22:05:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:00,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428862284] [2021-06-05 22:05:00,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428862284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:00,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728672905] [2021-06-05 22:05:00,742 INFO L93 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 22:05:00,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:00,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728672905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:01,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:01,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:01,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845514075] [2021-06-05 22:05:01,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:01,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:01,014 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 22:05:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,319 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-06-05 22:05:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:01,319 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 22:05:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,320 INFO L225 Difference]: With dead ends: 563 [2021-06-05 22:05:01,320 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 22:05:01,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 22:05:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2021-06-05 22:05:01,323 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 22:05:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-06-05 22:05:01,323 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-06-05 22:05:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,324 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-06-05 22:05:01,324 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 22:05:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-06-05 22:05:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:01,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,324 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-05 22:05:01,524 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1065644357, now seen corresponding path program 463 times [2021-06-05 22:05:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956457455] [2021-06-05 22:05:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956457455] [2021-06-05 22:05:01,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956457455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:01,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604234718] [2021-06-05 22:05:01,582 INFO 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 22:05:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604234718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:01,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:01,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:01,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500996054] [2021-06-05 22:05:01,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:01,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:01,819 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 22:05:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:02,178 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2021-06-05 22:05:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:02,178 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 22:05:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:02,179 INFO L225 Difference]: With dead ends: 651 [2021-06-05 22:05:02,179 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 22:05:02,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 22:05:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2021-06-05 22:05:02,183 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 22:05:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2021-06-05 22:05:02,183 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2021-06-05 22:05:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:02,183 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2021-06-05 22:05:02,183 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 22:05:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2021-06-05 22:05:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:02,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:02,184 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:02,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-05 22:05:02,384 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:02,384 INFO L82 PathProgramCache]: Analyzing trace with hash 946711745, now seen corresponding path program 464 times [2021-06-05 22:05:02,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:02,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415094146] [2021-06-05 22:05:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:02,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:02,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415094146] [2021-06-05 22:05:02,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415094146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:02,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122867637] [2021-06-05 22:05:02,444 INFO L93 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 22:05:02,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:02,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:02,715 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 22:05:02,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122867637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:02,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:02,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:02,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329935923] [2021-06-05 22:05:02,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:02,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:02,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:02,716 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 22:05:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:03,126 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2021-06-05 22:05:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:03,126 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 22:05:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:03,127 INFO L225 Difference]: With dead ends: 612 [2021-06-05 22:05:03,127 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 22:05:03,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 22:05:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2021-06-05 22:05:03,130 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 22:05:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2021-06-05 22:05:03,131 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2021-06-05 22:05:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:03,131 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2021-06-05 22:05:03,131 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 22:05:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2021-06-05 22:05:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:03,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:03,131 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:03,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4153,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:03,332 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1698112183, now seen corresponding path program 465 times [2021-06-05 22:05:03,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:03,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740571032] [2021-06-05 22:05:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:03,393 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 22:05:03,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:03,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740571032] [2021-06-05 22:05:03,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740571032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851579050] [2021-06-05 22:05:03,394 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 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 22:05:03,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:03,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:03,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:03,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851579050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:03,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873660912] [2021-06-05 22:05:03,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:03,659 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 22:05:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:04,219 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2021-06-05 22:05:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:04,219 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 22:05:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:04,220 INFO L225 Difference]: With dead ends: 637 [2021-06-05 22:05:04,220 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 22:05:04,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 629.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 22:05:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-06-05 22:05:04,223 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 22:05:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-06-05 22:05:04,224 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-06-05 22:05:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:04,224 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-06-05 22:05:04,224 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 22:05:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-06-05 22:05:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:04,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:04,225 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:04,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-06-05 22:05:04,425 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash -217311743, now seen corresponding path program 466 times [2021-06-05 22:05:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:04,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303421181] [2021-06-05 22:05:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:04,488 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 22:05:04,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:04,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303421181] [2021-06-05 22:05:04,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303421181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:04,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319393927] [2021-06-05 22:05:04,488 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 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 22:05:04,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:04,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:04,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319393927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:04,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:04,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:04,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172494046] [2021-06-05 22:05:04,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:04,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:04,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:04,758 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 22:05:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:05,151 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2021-06-05 22:05:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:05,156 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 22:05:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:05,156 INFO L225 Difference]: With dead ends: 608 [2021-06-05 22:05:05,156 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 22:05:05,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 22:05:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2021-06-05 22:05:05,160 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 22:05:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 22:05:05,160 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 22:05:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:05,160 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 22:05:05,160 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 22:05:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 22:05:05,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:05,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:05,161 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:05,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:05,361 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:05,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1114969903, now seen corresponding path program 467 times [2021-06-05 22:05:05,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:05,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326501105] [2021-06-05 22:05:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:05,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:05,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326501105] [2021-06-05 22:05:05,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326501105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502274336] [2021-06-05 22:05:05,427 INFO L93 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 22:05:05,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:05,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:05,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502274336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:05,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:05,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019364878] [2021-06-05 22:05:05,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:05,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:05,729 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 22:05:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:06,033 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2021-06-05 22:05:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:06,033 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 22:05:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:06,033 INFO L225 Difference]: With dead ends: 489 [2021-06-05 22:05:06,034 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 22:05:06,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 22:05:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2021-06-05 22:05:06,037 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 22:05:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-06-05 22:05:06,037 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-06-05 22:05:06,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:06,037 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-06-05 22:05:06,037 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 22:05:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-06-05 22:05:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:06,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:06,038 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:06,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:06,238 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:06,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1686089671, now seen corresponding path program 468 times [2021-06-05 22:05:06,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:06,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731045465] [2021-06-05 22:05:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:06,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731045465] [2021-06-05 22:05:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731045465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918314839] [2021-06-05 22:05:06,301 INFO L93 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 22:05:06,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:06,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:06,576 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 22:05:06,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918314839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:06,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:06,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317485422] [2021-06-05 22:05:06,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:06,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:06,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:06,577 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 22:05:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:06,858 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2021-06-05 22:05:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:06,858 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 22:05:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:06,858 INFO L225 Difference]: With dead ends: 495 [2021-06-05 22:05:06,859 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 22:05:06,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 22:05:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2021-06-05 22:05:06,862 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 22:05:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 22:05:06,862 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 22:05:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:06,862 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 22:05:06,862 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 22:05:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 22:05:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:06,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:06,863 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:07,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4191 [2021-06-05 22:05:07,063 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2071022047, now seen corresponding path program 469 times [2021-06-05 22:05:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:07,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428862505] [2021-06-05 22:05:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:07,125 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 22:05:07,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:07,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428862505] [2021-06-05 22:05:07,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428862505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:07,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243107265] [2021-06-05 22:05:07,125 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 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 22:05:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:07,392 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 22:05:07,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243107265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:07,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:07,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:07,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154185440] [2021-06-05 22:05:07,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:07,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:07,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:07,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:07,393 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 22:05:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:07,657 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2021-06-05 22:05:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:07,657 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 22:05:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:07,658 INFO L225 Difference]: With dead ends: 459 [2021-06-05 22:05:07,658 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 22:05:07,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 22:05:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2021-06-05 22:05:07,661 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 22:05:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 22:05:07,661 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 22:05:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:07,661 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 22:05:07,661 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 22:05:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 22:05:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:07,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:07,662 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:07,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4199 [2021-06-05 22:05:07,862 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash 703607195, now seen corresponding path program 470 times [2021-06-05 22:05:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:07,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322178951] [2021-06-05 22:05:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:07,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:07,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322178951] [2021-06-05 22:05:07,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322178951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:07,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499737528] [2021-06-05 22:05:07,930 INFO L93 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 22:05:08,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:08,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:08,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:08,188 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 22:05:08,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499737528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:08,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:08,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:08,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60541119] [2021-06-05 22:05:08,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:08,188 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 22:05:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:08,495 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2021-06-05 22:05:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:08,495 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 22:05:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:08,496 INFO L225 Difference]: With dead ends: 576 [2021-06-05 22:05:08,496 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 22:05:08,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 22:05:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2021-06-05 22:05:08,499 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 22:05:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 22:05:08,500 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 22:05:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:08,500 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 22:05:08,500 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 22:05:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 22:05:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:08,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:08,500 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:08,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4206,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:08,701 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash -790300527, now seen corresponding path program 471 times [2021-06-05 22:05:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:08,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298337047] [2021-06-05 22:05:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:08,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298337047] [2021-06-05 22:05:08,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298337047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765177590] [2021-06-05 22:05:08,765 INFO L93 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 22:05:08,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:08,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:09,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765177590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:09,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:09,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:09,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297167964] [2021-06-05 22:05:09,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:09,015 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 22:05:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:09,401 INFO L93 Difference]: Finished difference Result 582 states and 1624 transitions. [2021-06-05 22:05:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:09,401 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 22:05:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:09,402 INFO L225 Difference]: With dead ends: 582 [2021-06-05 22:05:09,402 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 22:05:09,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 22:05:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 306. [2021-06-05 22:05:09,411 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 22:05:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-06-05 22:05:09,411 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-06-05 22:05:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:09,411 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-06-05 22:05:09,411 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 22:05:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-06-05 22:05:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:09,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:09,412 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:09,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4218 [2021-06-05 22:05:09,613 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1455007633, now seen corresponding path program 472 times [2021-06-05 22:05:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:09,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658011221] [2021-06-05 22:05:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:09,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:09,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658011221] [2021-06-05 22:05:09,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658011221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:09,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522940181] [2021-06-05 22:05:09,682 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 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 22:05:09,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:09,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:09,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522940181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:09,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:09,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:09,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188650520] [2021-06-05 22:05:09,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:09,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:09,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:09,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:09,972 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 22:05:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:10,199 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2021-06-05 22:05:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:10,199 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 22:05:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:10,200 INFO L225 Difference]: With dead ends: 544 [2021-06-05 22:05:10,200 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 22:05:10,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 22:05:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2021-06-05 22:05:10,203 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 22:05:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-06-05 22:05:10,204 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-06-05 22:05:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:10,204 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-06-05 22:05:10,204 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 22:05:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-06-05 22:05:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:10,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:10,204 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:10,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:10,405 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1547617263, now seen corresponding path program 473 times [2021-06-05 22:05:10,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:10,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447735971] [2021-06-05 22:05:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:10,473 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 22:05:10,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447735971] [2021-06-05 22:05:10,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447735971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500588140] [2021-06-05 22:05:10,473 INFO L93 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 22:05:10,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:10,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:10,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:10,725 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 22:05:10,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500588140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:10,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:10,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:10,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945182789] [2021-06-05 22:05:10,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:10,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:10,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:10,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:10,726 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 22:05:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:10,923 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-06-05 22:05:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:10,924 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 22:05:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:10,924 INFO L225 Difference]: With dead ends: 507 [2021-06-05 22:05:10,924 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 22:05:10,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 22:05:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 296. [2021-06-05 22:05:10,927 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 22:05:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-06-05 22:05:10,928 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-06-05 22:05:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:10,928 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-06-05 22:05:10,928 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 22:05:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-06-05 22:05:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:10,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:10,928 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:11,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:11,129 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1475744161, now seen corresponding path program 474 times [2021-06-05 22:05:11,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:11,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591866530] [2021-06-05 22:05:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:11,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:11,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591866530] [2021-06-05 22:05:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591866530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993555527] [2021-06-05 22:05:11,193 INFO L93 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 22:05:11,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:11,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:11,484 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 22:05:11,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993555527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:11,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:11,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725458373] [2021-06-05 22:05:11,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:11,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:11,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:11,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:11,485 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 22:05:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:11,884 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2021-06-05 22:05:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:11,884 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 22:05:11,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:11,885 INFO L225 Difference]: With dead ends: 544 [2021-06-05 22:05:11,885 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 22:05:11,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 22:05:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2021-06-05 22:05:11,888 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 22:05:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-06-05 22:05:11,889 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-06-05 22:05:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:11,889 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-06-05 22:05:11,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-06-05 22:05:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:11,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:11,889 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:12,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4242 [2021-06-05 22:05:12,090 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:12,090 INFO L82 PathProgramCache]: Analyzing trace with hash -439679765, now seen corresponding path program 475 times [2021-06-05 22:05:12,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:12,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252766008] [2021-06-05 22:05:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:12,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252766008] [2021-06-05 22:05:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252766008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401896930] [2021-06-05 22:05:12,156 INFO 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 22:05:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:12,421 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 22:05:12,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401896930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:12,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:12,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:12,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66084199] [2021-06-05 22:05:12,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:12,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:12,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:12,422 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 22:05:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:12,754 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2021-06-05 22:05:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:12,754 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 22:05:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:12,755 INFO L225 Difference]: With dead ends: 521 [2021-06-05 22:05:12,755 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 22:05:12,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 22:05:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-06-05 22:05:12,758 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 22:05:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 22:05:12,759 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 22:05:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:12,759 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 22:05:12,759 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 22:05:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 22:05:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:12,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:12,759 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:12,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4254 [2021-06-05 22:05:12,959 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -543113455, now seen corresponding path program 476 times [2021-06-05 22:05:12,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:12,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10065882] [2021-06-05 22:05:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:13,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:13,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10065882] [2021-06-05 22:05:13,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10065882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:13,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524546549] [2021-06-05 22:05:13,031 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 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 22:05:13,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:13,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:13,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:13,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524546549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:13,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:13,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902709551] [2021-06-05 22:05:13,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:13,298 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 22:05:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:13,569 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2021-06-05 22:05:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:13,569 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 22:05:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:13,570 INFO L225 Difference]: With dead ends: 461 [2021-06-05 22:05:13,570 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 22:05:13,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 22:05:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2021-06-05 22:05:13,573 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 22:05:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 22:05:13,573 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-06-05 22:05:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:13,573 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 22:05:13,573 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 22:05:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 22:05:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:13,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:13,574 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:13,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4266 [2021-06-05 22:05:13,774 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash 208286983, now seen corresponding path program 477 times [2021-06-05 22:05:13,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:13,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118357643] [2021-06-05 22:05:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:13,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:13,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118357643] [2021-06-05 22:05:13,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118357643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:13,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833743483] [2021-06-05 22:05:13,847 INFO L93 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 22:05:13,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:14,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833743483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:14,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:14,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:14,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826814901] [2021-06-05 22:05:14,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:14,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:14,145 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 22:05:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:14,459 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2021-06-05 22:05:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:14,459 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 22:05:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:14,460 INFO L225 Difference]: With dead ends: 486 [2021-06-05 22:05:14,460 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 22:05:14,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 22:05:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2021-06-05 22:05:14,463 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 22:05:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-06-05 22:05:14,463 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-06-05 22:05:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:14,464 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-06-05 22:05:14,464 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 22:05:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-06-05 22:05:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:14,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:14,464 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:14,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4273 [2021-06-05 22:05:14,664 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1707136943, now seen corresponding path program 478 times [2021-06-05 22:05:14,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:14,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70194493] [2021-06-05 22:05:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:14,729 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 22:05:14,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:14,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70194493] [2021-06-05 22:05:14,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70194493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:14,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558716733] [2021-06-05 22:05:14,729 INFO L93 rtionOrderModulation]: Changing 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 22:05:14,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:14,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:14,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:15,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558716733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:15,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:15,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293405583] [2021-06-05 22:05:15,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:15,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:15,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:15,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:15,009 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:15,242 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2021-06-05 22:05:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:15,243 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 22:05:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:15,243 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:05:15,243 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:05:15,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:05:15,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2021-06-05 22:05:15,246 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 22:05:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 22:05:15,247 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 22:05:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:15,247 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 22:05:15,247 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 22:05:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 22:05:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:15,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:15,247 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:15,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4283,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:15,448 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:15,448 INFO L82 PathProgramCache]: Analyzing trace with hash -357170895, now seen corresponding path program 479 times [2021-06-05 22:05:15,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:15,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6165366] [2021-06-05 22:05:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:15,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:15,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6165366] [2021-06-05 22:05:15,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6165366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713171010] [2021-06-05 22:05:15,515 INFO L93 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 22:05:15,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:15,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:15,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713171010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:15,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461879037] [2021-06-05 22:05:15,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:15,750 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 22:05:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:16,046 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2021-06-05 22:05:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:16,046 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 22:05:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:16,047 INFO L225 Difference]: With dead ends: 586 [2021-06-05 22:05:16,047 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 22:05:16,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 22:05:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2021-06-05 22:05:16,051 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 22:05:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-06-05 22:05:16,052 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-06-05 22:05:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:16,052 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-06-05 22:05:16,052 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 22:05:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-06-05 22:05:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:16,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:16,052 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:16,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-05 22:05:16,253 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1851078617, now seen corresponding path program 480 times [2021-06-05 22:05:16,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:16,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850462453] [2021-06-05 22:05:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:16,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850462453] [2021-06-05 22:05:16,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850462453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796288845] [2021-06-05 22:05:16,318 INFO L93 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 22:05:16,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796288845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:16,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:16,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269268407] [2021-06-05 22:05:16,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:16,579 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 22:05:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:16,813 INFO L93 Difference]: Finished difference Result 540 states and 1535 transitions. [2021-06-05 22:05:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:16,813 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 22:05:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:16,814 INFO L225 Difference]: With dead ends: 540 [2021-06-05 22:05:16,814 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 22:05:16,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:16,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 22:05:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 307. [2021-06-05 22:05:16,818 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 22:05:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 22:05:16,818 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 22:05:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:16,818 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 22:05:16,818 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 22:05:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 22:05:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:16,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:16,819 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:17,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:17,019 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash 394229543, now seen corresponding path program 481 times [2021-06-05 22:05:17,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:17,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94243440] [2021-06-05 22:05:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:17,087 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 22:05:17,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:17,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94243440] [2021-06-05 22:05:17,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94243440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344405787] [2021-06-05 22:05:17,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:05:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:17,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344405787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:17,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:17,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870200022] [2021-06-05 22:05:17,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:17,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:17,344 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 22:05:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:17,550 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2021-06-05 22:05:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:17,551 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 22:05:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:17,551 INFO L225 Difference]: With dead ends: 592 [2021-06-05 22:05:17,551 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 22:05:17,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 22:05:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-06-05 22:05:17,555 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 22:05:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-06-05 22:05:17,555 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-06-05 22:05:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:17,555 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-06-05 22:05:17,555 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 22:05:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-06-05 22:05:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:17,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:17,556 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:17,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:17,756 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1686571943, now seen corresponding path program 482 times [2021-06-05 22:05:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:17,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266304025] [2021-06-05 22:05:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:17,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:17,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266304025] [2021-06-05 22:05:17,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266304025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274714656] [2021-06-05 22:05:17,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:05:17,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:17,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:18,067 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 22:05:18,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274714656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:18,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:18,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681536120] [2021-06-05 22:05:18,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:18,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:18,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:18,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:18,068 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 22:05:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:18,286 INFO L93 Difference]: Finished difference Result 555 states and 1595 transitions. [2021-06-05 22:05:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:18,286 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 22:05:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:18,287 INFO L225 Difference]: With dead ends: 555 [2021-06-05 22:05:18,287 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 22:05:18,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 22:05:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 307. [2021-06-05 22:05:18,291 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 22:05:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 22:05:18,292 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 22:05:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:18,292 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 22:05:18,292 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 22:05:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 22:05:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:18,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:18,293 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:18,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:18,513 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash 414966071, now seen corresponding path program 483 times [2021-06-05 22:05:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663642479] [2021-06-05 22:05:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:18,580 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 22:05:18,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663642479] [2021-06-05 22:05:18,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663642479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618333738] [2021-06-05 22:05:18,580 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 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 22:05:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:18,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618333738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:18,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:18,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510736429] [2021-06-05 22:05:18,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:18,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:18,814 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 22:05:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:19,036 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2021-06-05 22:05:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:19,036 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 22:05:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:19,037 INFO L225 Difference]: With dead ends: 580 [2021-06-05 22:05:19,037 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 22:05:19,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 22:05:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2021-06-05 22:05:19,040 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 22:05:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 22:05:19,041 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 22:05:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:19,041 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 22:05:19,041 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 22:05:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 22:05:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:19,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:19,041 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:19,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-06-05 22:05:19,242 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1500457855, now seen corresponding path program 484 times [2021-06-05 22:05:19,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:19,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874656047] [2021-06-05 22:05:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:19,309 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 22:05:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874656047] [2021-06-05 22:05:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874656047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538241039] [2021-06-05 22:05:19,309 INFO L93 rtionOrderModulation]: Changing 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 22:05:19,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:19,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:19,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538241039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:19,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:19,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:19,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723574661] [2021-06-05 22:05:19,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:19,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:19,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:19,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:19,547 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 22:05:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:19,868 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2021-06-05 22:05:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:19,868 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 22:05:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:19,869 INFO L225 Difference]: With dead ends: 586 [2021-06-05 22:05:19,869 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 22:05:19,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 22:05:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2021-06-05 22:05:19,872 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 22:05:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-06-05 22:05:19,873 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-06-05 22:05:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:19,873 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-06-05 22:05:19,873 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 22:05:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-06-05 22:05:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:19,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:19,873 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:20,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-05 22:05:20,074 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:20,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1718199087, now seen corresponding path program 485 times [2021-06-05 22:05:20,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:20,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121348264] [2021-06-05 22:05:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:20,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:20,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121348264] [2021-06-05 22:05:20,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121348264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498255757] [2021-06-05 22:05:20,143 INFO L93 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 22:05:20,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:20,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498255757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:20,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:20,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030725009] [2021-06-05 22:05:20,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:20,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:20,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:20,403 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 22:05:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:20,594 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2021-06-05 22:05:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:20,594 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 22:05:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:20,595 INFO L225 Difference]: With dead ends: 516 [2021-06-05 22:05:20,595 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 22:05:20,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 22:05:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2021-06-05 22:05:20,598 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 22:05:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-06-05 22:05:20,599 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-06-05 22:05:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:20,599 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-06-05 22:05:20,599 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 22:05:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-06-05 22:05:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:20,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:20,599 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:20,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4352 [2021-06-05 22:05:20,800 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash -425856687, now seen corresponding path program 486 times [2021-06-05 22:05:20,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:20,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801761774] [2021-06-05 22:05:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:20,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:20,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801761774] [2021-06-05 22:05:20,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801761774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466411219] [2021-06-05 22:05:20,869 INFO L93 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 22:05:20,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:20,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:20,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:21,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466411219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:21,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:21,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936877778] [2021-06-05 22:05:21,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:21,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:21,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:21,113 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 22:05:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:21,327 INFO L93 Difference]: Finished difference Result 504 states and 1462 transitions. [2021-06-05 22:05:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:21,327 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 22:05:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:21,328 INFO L225 Difference]: With dead ends: 504 [2021-06-05 22:05:21,328 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 22:05:21,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 22:05:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 298. [2021-06-05 22:05:21,331 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 22:05:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 22:05:21,331 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 22:05:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:21,332 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 22:05:21,332 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 22:05:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 22:05:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:21,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:21,332 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:21,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4362 [2021-06-05 22:05:21,533 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1973245573, now seen corresponding path program 487 times [2021-06-05 22:05:21,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:21,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104320626] [2021-06-05 22:05:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:21,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:21,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104320626] [2021-06-05 22:05:21,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104320626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276944881] [2021-06-05 22:05:21,598 INFO 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 22:05:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:21,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:21,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276944881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:21,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:21,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821163752] [2021-06-05 22:05:21,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:21,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:21,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:21,820 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 22:05:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:22,006 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2021-06-05 22:05:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:22,007 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 22:05:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:22,007 INFO L225 Difference]: With dead ends: 459 [2021-06-05 22:05:22,007 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 22:05:22,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 22:05:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2021-06-05 22:05:22,010 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 22:05:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-06-05 22:05:22,010 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-06-05 22:05:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:22,011 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-06-05 22:05:22,011 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 22:05:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-06-05 22:05:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:22,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:22,011 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:22,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4373 [2021-06-05 22:05:22,211 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:22,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1330047559, now seen corresponding path program 488 times [2021-06-05 22:05:22,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:22,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91358251] [2021-06-05 22:05:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:22,275 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 22:05:22,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:22,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91358251] [2021-06-05 22:05:22,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91358251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626678642] [2021-06-05 22:05:22,275 INFO L93 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 22:05:22,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:22,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:22,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:22,532 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 22:05:22,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626678642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:22,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487140903] [2021-06-05 22:05:22,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:22,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:22,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:22,533 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 22:05:22,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:22,718 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2021-06-05 22:05:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:22,719 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 22:05:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:22,719 INFO L225 Difference]: With dead ends: 504 [2021-06-05 22:05:22,719 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 22:05:22,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 22:05:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2021-06-05 22:05:22,723 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 22:05:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-06-05 22:05:22,723 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-06-05 22:05:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:22,723 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-06-05 22:05:22,723 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 22:05:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-06-05 22:05:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:22,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:22,724 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:22,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4378,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:22,924 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:22,924 INFO L82 PathProgramCache]: Analyzing trace with hash -585376367, now seen corresponding path program 489 times [2021-06-05 22:05:22,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:22,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17026371] [2021-06-05 22:05:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:22,988 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 22:05:22,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:22,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17026371] [2021-06-05 22:05:22,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17026371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371412820] [2021-06-05 22:05:22,988 INFO L93 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 22:05:23,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:23,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:23,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371412820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:23,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:23,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520393798] [2021-06-05 22:05:23,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:23,221 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 22:05:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:23,425 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2021-06-05 22:05:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:23,425 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 22:05:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:23,426 INFO L225 Difference]: With dead ends: 510 [2021-06-05 22:05:23,426 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 22:05:23,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 22:05:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2021-06-05 22:05:23,429 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 22:05:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 22:05:23,430 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 22:05:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:23,430 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 22:05:23,430 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 22:05:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 22:05:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:23,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:23,430 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:23,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-06-05 22:05:23,631 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 454859431, now seen corresponding path program 490 times [2021-06-05 22:05:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:23,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829413576] [2021-06-05 22:05:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:23,702 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 22:05:23,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:23,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829413576] [2021-06-05 22:05:23,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829413576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746300512] [2021-06-05 22:05:23,703 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 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 22:05:23,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:23,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:23,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:23,948 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 22:05:23,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746300512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:23,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:23,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768401153] [2021-06-05 22:05:23,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:23,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:23,949 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 22:05:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:24,151 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2021-06-05 22:05:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:24,151 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 22:05:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:24,151 INFO L225 Difference]: With dead ends: 479 [2021-06-05 22:05:24,152 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 22:05:24,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 22:05:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2021-06-05 22:05:24,154 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 22:05:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 22:05:24,155 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 22:05:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:24,155 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 22:05:24,155 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 22:05:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 22:05:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:24,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:24,155 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:24,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4395,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:24,356 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2054608897, now seen corresponding path program 491 times [2021-06-05 22:05:24,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:24,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444890586] [2021-06-05 22:05:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:24,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444890586] [2021-06-05 22:05:24,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444890586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782534679] [2021-06-05 22:05:24,411 INFO L93 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 22:05:24,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:24,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:24,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782534679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:24,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092140369] [2021-06-05 22:05:24,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:24,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:24,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:24,634 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 22:05:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:24,814 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2021-06-05 22:05:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:24,814 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 22:05:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:24,814 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:05:24,814 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 22:05:24,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 22:05:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2021-06-05 22:05:24,817 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 22:05:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-06-05 22:05:24,818 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-06-05 22:05:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:24,818 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-06-05 22:05:24,818 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 22:05:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-06-05 22:05:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:24,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:24,818 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:25,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:25,018 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1488957961, now seen corresponding path program 492 times [2021-06-05 22:05:25,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:25,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949342636] [2021-06-05 22:05:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:25,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:25,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949342636] [2021-06-05 22:05:25,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949342636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361698309] [2021-06-05 22:05:25,075 INFO L93 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 22:05:25,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:25,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:25,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361698309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:25,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:25,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464527614] [2021-06-05 22:05:25,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:25,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:25,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:25,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:25,299 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 22:05:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:25,548 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2021-06-05 22:05:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:25,548 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 22:05:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:25,549 INFO L225 Difference]: With dead ends: 476 [2021-06-05 22:05:25,549 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 22:05:25,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 22:05:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2021-06-05 22:05:25,552 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 22:05:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-06-05 22:05:25,552 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-06-05 22:05:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:25,552 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-06-05 22:05:25,552 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 22:05:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-06-05 22:05:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:25,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:25,553 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:25,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:25,753 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash 890585409, now seen corresponding path program 493 times [2021-06-05 22:05:25,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:25,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303102611] [2021-06-05 22:05:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:25,811 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 22:05:25,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:25,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303102611] [2021-06-05 22:05:25,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303102611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740997396] [2021-06-05 22:05:25,812 INFO 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 22:05:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740997396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:26,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:26,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293320411] [2021-06-05 22:05:26,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:26,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:26,036 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 22:05:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:26,215 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2021-06-05 22:05:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:26,215 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 22:05:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:26,216 INFO L225 Difference]: With dead ends: 447 [2021-06-05 22:05:26,216 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 22:05:26,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 22:05:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2021-06-05 22:05:26,218 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 22:05:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-06-05 22:05:26,219 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-06-05 22:05:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:26,219 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-06-05 22:05:26,219 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 22:05:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-06-05 22:05:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:26,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:26,219 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:26,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4418,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:26,420 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash 693580705, now seen corresponding path program 494 times [2021-06-05 22:05:26,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:26,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137369052] [2021-06-05 22:05:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:26,476 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 22:05:26,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:26,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137369052] [2021-06-05 22:05:26,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137369052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271388200] [2021-06-05 22:05:26,476 INFO L93 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 22:05:26,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:26,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:26,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271388200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:26,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:26,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077688957] [2021-06-05 22:05:26,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:26,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:26,691 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 22:05:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:26,873 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2021-06-05 22:05:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:26,874 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 22:05:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:26,874 INFO L225 Difference]: With dead ends: 482 [2021-06-05 22:05:26,874 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 22:05:26,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 22:05:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2021-06-05 22:05:26,878 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 22:05:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-06-05 22:05:26,878 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-06-05 22:05:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:26,878 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-06-05 22:05:26,878 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 22:05:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-06-05 22:05:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:26,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:26,879 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:27,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4424,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:27,079 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1221843221, now seen corresponding path program 495 times [2021-06-05 22:05:27,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:27,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163802582] [2021-06-05 22:05:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:27,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163802582] [2021-06-05 22:05:27,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163802582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719879324] [2021-06-05 22:05:27,143 INFO L93 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 22:05:27,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:27,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:27,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:27,355 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 22:05:27,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719879324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:27,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685526882] [2021-06-05 22:05:27,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:27,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:27,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:27,356 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 22:05:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:27,566 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2021-06-05 22:05:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:27,567 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 22:05:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:27,567 INFO L225 Difference]: With dead ends: 482 [2021-06-05 22:05:27,567 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 22:05:27,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 22:05:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2021-06-05 22:05:27,571 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 22:05:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-06-05 22:05:27,571 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-06-05 22:05:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:27,571 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-06-05 22:05:27,571 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 22:05:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-06-05 22:05:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:27,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:27,572 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:27,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-06-05 22:05:27,775 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash -181607423, now seen corresponding path program 496 times [2021-06-05 22:05:27,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:27,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444861146] [2021-06-05 22:05:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444861146] [2021-06-05 22:05:27,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444861146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079295699] [2021-06-05 22:05:27,832 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 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 22:05:27,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:28,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079295699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:28,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:28,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788883649] [2021-06-05 22:05:28,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:28,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:28,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:28,032 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 22:05:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:28,191 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2021-06-05 22:05:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:28,191 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 22:05:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:28,192 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:05:28,192 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:05:28,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:05:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2021-06-05 22:05:28,195 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 22:05:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 22:05:28,195 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 22:05:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:28,195 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 22:05:28,195 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 22:05:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 22:05:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:28,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:28,195 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:28,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4435,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:28,396 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2140630069, now seen corresponding path program 497 times [2021-06-05 22:05:28,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:28,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484720537] [2021-06-05 22:05:28,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:28,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:28,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484720537] [2021-06-05 22:05:28,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484720537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685291662] [2021-06-05 22:05:28,448 INFO L93 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 22:05:28,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:28,659 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 22:05:28,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685291662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:28,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:28,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316264238] [2021-06-05 22:05:28,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:28,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:28,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:28,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:28,660 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 22:05:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:28,924 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2021-06-05 22:05:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:28,924 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 22:05:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:28,925 INFO L225 Difference]: With dead ends: 529 [2021-06-05 22:05:28,925 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 22:05:28,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 22:05:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2021-06-05 22:05:28,928 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 22:05:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 22:05:28,928 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 22:05:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:28,928 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 22:05:28,928 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 22:05:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 22:05:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:28,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:28,929 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:29,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4438 [2021-06-05 22:05:29,129 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash -128273967, now seen corresponding path program 498 times [2021-06-05 22:05:29,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:29,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679268118] [2021-06-05 22:05:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:29,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679268118] [2021-06-05 22:05:29,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679268118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893370937] [2021-06-05 22:05:29,183 INFO L93 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 22:05:29,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:29,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893370937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:29,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:29,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370503718] [2021-06-05 22:05:29,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:29,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:29,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:29,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:29,411 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 22:05:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:29,670 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2021-06-05 22:05:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:29,671 INFO L225 Difference]: With dead ends: 525 [2021-06-05 22:05:29,671 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 22:05:29,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 22:05:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2021-06-05 22:05:29,675 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 22:05:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 22:05:29,675 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 22:05:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:29,675 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 22:05:29,675 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 22:05:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 22:05:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:29,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:29,676 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:29,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:29,876 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:29,876 INFO L82 PathProgramCache]: Analyzing trace with hash 623126471, now seen corresponding path program 499 times [2021-06-05 22:05:29,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:29,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801539153] [2021-06-05 22:05:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:29,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801539153] [2021-06-05 22:05:29,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801539153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067502039] [2021-06-05 22:05:29,931 INFO 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 22:05:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:30,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:30,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067502039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:30,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:30,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822522824] [2021-06-05 22:05:30,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:30,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:30,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:30,163 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 22:05:30,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:30,518 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2021-06-05 22:05:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:30,518 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 22:05:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:30,518 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:05:30,519 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 22:05:30,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 22:05:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2021-06-05 22:05:30,522 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 22:05:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 22:05:30,523 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 22:05:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:30,523 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 22:05:30,523 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 22:05:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 22:05:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:30,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:30,523 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:30,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4448 [2021-06-05 22:05:30,724 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1292297455, now seen corresponding path program 500 times [2021-06-05 22:05:30,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:30,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232607893] [2021-06-05 22:05:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232607893] [2021-06-05 22:05:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232607893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434582796] [2021-06-05 22:05:30,780 INFO L93 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 22:05:30,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:31,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434582796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:31,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:31,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371468246] [2021-06-05 22:05:31,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:31,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:31,005 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 22:05:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:31,238 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2021-06-05 22:05:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:31,238 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 22:05:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:31,239 INFO L225 Difference]: With dead ends: 521 [2021-06-05 22:05:31,239 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 22:05:31,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 22:05:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-06-05 22:05:31,242 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 22:05:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-06-05 22:05:31,242 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-06-05 22:05:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:31,242 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-06-05 22:05:31,242 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 22:05:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-06-05 22:05:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:31,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:31,243 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:31,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4455,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:31,443 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash -764740821, now seen corresponding path program 501 times [2021-06-05 22:05:31,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:31,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627844709] [2021-06-05 22:05:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:31,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:31,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627844709] [2021-06-05 22:05:31,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627844709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664104769] [2021-06-05 22:05:31,506 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 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 22:05:31,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:31,717 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 22:05:31,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664104769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:31,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:31,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362077192] [2021-06-05 22:05:31,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:31,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:31,718 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 22:05:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:31,920 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2021-06-05 22:05:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:31,920 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 22:05:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:31,921 INFO L225 Difference]: With dead ends: 470 [2021-06-05 22:05:31,921 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 22:05:31,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 22:05:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2021-06-05 22:05:31,923 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 22:05:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 22:05:31,924 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 22:05:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:31,924 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 22:05:31,924 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 22:05:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 22:05:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:31,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:31,924 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:32,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4461 [2021-06-05 22:05:32,125 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:32,125 INFO L82 PathProgramCache]: Analyzing trace with hash -13340383, now seen corresponding path program 502 times [2021-06-05 22:05:32,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:32,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333734491] [2021-06-05 22:05:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333734491] [2021-06-05 22:05:32,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333734491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737242351] [2021-06-05 22:05:32,176 INFO L93 rtionOrderModulation]: Changing 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 22:05:32,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737242351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:32,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:32,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430125269] [2021-06-05 22:05:32,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:32,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:32,384 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 22:05:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:32,629 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2021-06-05 22:05:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:32,630 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 22:05:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:32,630 INFO L225 Difference]: With dead ends: 495 [2021-06-05 22:05:32,630 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 22:05:32,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 22:05:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2021-06-05 22:05:32,634 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 22:05:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 22:05:32,634 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 22:05:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:32,634 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 22:05:32,634 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 22:05:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 22:05:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:32,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:32,635 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:32,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4466,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:32,835 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764309, now seen corresponding path program 503 times [2021-06-05 22:05:32,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:32,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058187684] [2021-06-05 22:05:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:32,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058187684] [2021-06-05 22:05:32,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058187684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495930471] [2021-06-05 22:05:32,889 INFO L93 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 22:05:32,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:32,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:33,101 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 22:05:33,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495930471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:33,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:33,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019664977] [2021-06-05 22:05:33,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:33,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:33,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:33,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:33,101 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 22:05:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:33,274 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2021-06-05 22:05:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:33,275 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 22:05:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:33,275 INFO L225 Difference]: With dead ends: 466 [2021-06-05 22:05:33,275 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 22:05:33,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 22:05:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2021-06-05 22:05:33,278 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 22:05:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 22:05:33,278 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 22:05:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:33,279 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 22:05:33,279 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 22:05:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 22:05:33,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:33,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:33,279 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:33,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-06-05 22:05:33,480 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2125769013, now seen corresponding path program 504 times [2021-06-05 22:05:33,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:33,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281847876] [2021-06-05 22:05:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:33,532 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 22:05:33,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:33,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281847876] [2021-06-05 22:05:33,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281847876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773872436] [2021-06-05 22:05:33,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:05:33,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:33,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:33,729 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 22:05:33,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773872436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:33,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:33,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52181476] [2021-06-05 22:05:33,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:33,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:33,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:33,729 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 22:05:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:33,908 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2021-06-05 22:05:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:33,909 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 22:05:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:33,909 INFO L225 Difference]: With dead ends: 501 [2021-06-05 22:05:33,909 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 22:05:33,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 22:05:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2021-06-05 22:05:33,913 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 22:05:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-06-05 22:05:33,913 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-06-05 22:05:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:33,913 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-06-05 22:05:33,913 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 22:05:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-06-05 22:05:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:33,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:33,914 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:34,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,114 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash 253774357, now seen corresponding path program 505 times [2021-06-05 22:05:34,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:34,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136478041] [2021-06-05 22:05:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:34,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136478041] [2021-06-05 22:05:34,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136478041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715310070] [2021-06-05 22:05:34,168 INFO 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 22:05:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:34,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:34,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715310070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:34,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731009927] [2021-06-05 22:05:34,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:34,402 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 22:05:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:34,623 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2021-06-05 22:05:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:34,624 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 22:05:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:34,624 INFO L225 Difference]: With dead ends: 501 [2021-06-05 22:05:34,624 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 22:05:34,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 22:05:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2021-06-05 22:05:34,627 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 22:05:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-06-05 22:05:34,628 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-06-05 22:05:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:34,628 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-06-05 22:05:34,628 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 22:05:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-06-05 22:05:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:34,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:34,628 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:34,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,829 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1294010155, now seen corresponding path program 506 times [2021-06-05 22:05:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:34,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508691075] [2021-06-05 22:05:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508691075] [2021-06-05 22:05:34,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508691075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667006869] [2021-06-05 22:05:34,882 INFO L93 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 22:05:34,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667006869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:35,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:05:35,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713035497] [2021-06-05 22:05:35,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:05:35,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:35,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:05:35,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:05:35,063 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 22:05:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:35,254 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2021-06-05 22:05:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:35,254 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 22:05:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:35,255 INFO L225 Difference]: With dead ends: 476 [2021-06-05 22:05:35,255 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 22:05:35,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 22:05:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2021-06-05 22:05:35,258 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 22:05:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 22:05:35,258 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 22:05:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:35,259 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 22:05:35,259 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 22:05:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 22:05:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:35,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:35,259 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:35,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:35,459 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:35,460 INFO L82 PathProgramCache]: Analyzing trace with hash -597379255, now seen corresponding path program 507 times [2021-06-05 22:05:35,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:35,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738921457] [2021-06-05 22:05:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:35,524 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 22:05:35,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:35,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738921457] [2021-06-05 22:05:35,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738921457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779483316] [2021-06-05 22:05:35,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:05:35,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:35,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:35,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779483316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:35,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:35,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893028985] [2021-06-05 22:05:35,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:35,807 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 22:05:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:36,062 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2021-06-05 22:05:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:36,062 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 22:05:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:36,063 INFO L225 Difference]: With dead ends: 481 [2021-06-05 22:05:36,063 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 22:05:36,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 22:05:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2021-06-05 22:05:36,066 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 22:05:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-06-05 22:05:36,066 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-06-05 22:05:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:36,066 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-06-05 22:05:36,066 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 22:05:36,066 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-06-05 22:05:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:36,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:36,067 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:36,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4492 [2021-06-05 22:05:36,267 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2091286977, now seen corresponding path program 508 times [2021-06-05 22:05:36,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:36,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879244657] [2021-06-05 22:05:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:36,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879244657] [2021-06-05 22:05:36,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879244657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308955350] [2021-06-05 22:05:36,331 INFO L93 rtionOrderModulation]: Changing 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 22:05:36,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:36,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:36,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:36,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:36,592 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 22:05:36,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308955350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:36,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:36,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080920411] [2021-06-05 22:05:36,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:36,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:36,593 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 22:05:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:36,881 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2021-06-05 22:05:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:36,882 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 22:05:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:36,882 INFO L225 Difference]: With dead ends: 487 [2021-06-05 22:05:36,882 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 22:05:36,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 22:05:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2021-06-05 22:05:36,886 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 22:05:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 22:05:36,886 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 22:05:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:36,886 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 22:05:36,886 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 22:05:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 22:05:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:36,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:36,887 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:37,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4500,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:37,087 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:37,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1553431399, now seen corresponding path program 509 times [2021-06-05 22:05:37,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:37,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444693199] [2021-06-05 22:05:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:37,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444693199] [2021-06-05 22:05:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444693199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922535885] [2021-06-05 22:05:37,151 INFO L93 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 22:05:37,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:37,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922535885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:37,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:37,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970932695] [2021-06-05 22:05:37,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:37,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:37,429 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 22:05:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:37,729 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2021-06-05 22:05:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:37,729 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 22:05:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:37,729 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:05:37,729 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 22:05:37,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 22:05:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2021-06-05 22:05:37,735 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 22:05:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 22:05:37,736 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 22:05:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:37,736 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 22:05:37,736 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 22:05:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 22:05:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:37,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:37,737 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:37,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4508 [2021-06-05 22:05:37,953 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:37,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1221197843, now seen corresponding path program 510 times [2021-06-05 22:05:37,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:37,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731967845] [2021-06-05 22:05:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:38,020 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 22:05:38,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:38,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731967845] [2021-06-05 22:05:38,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731967845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242816091] [2021-06-05 22:05:38,021 INFO L93 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 22:05:38,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:38,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:38,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:38,277 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 22:05:38,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242816091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:38,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:38,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510771278] [2021-06-05 22:05:38,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:38,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:38,278 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 22:05:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:38,627 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2021-06-05 22:05:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:38,628 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 22:05:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:38,628 INFO L225 Difference]: With dead ends: 568 [2021-06-05 22:05:38,628 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 22:05:38,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 22:05:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2021-06-05 22:05:38,632 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 22:05:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 22:05:38,633 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 22:05:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:38,633 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 22:05:38,633 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 22:05:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 22:05:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:38,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:38,633 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:38,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4515,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:38,834 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash -272709879, now seen corresponding path program 511 times [2021-06-05 22:05:38,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:38,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065539782] [2021-06-05 22:05:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:38,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:38,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065539782] [2021-06-05 22:05:38,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065539782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126236215] [2021-06-05 22:05:38,898 INFO 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 22:05:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126236215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:39,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:39,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064460041] [2021-06-05 22:05:39,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:39,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:39,208 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 22:05:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:39,597 INFO L93 Difference]: Finished difference Result 574 states and 1604 transitions. [2021-06-05 22:05:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:39,597 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 22:05:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:39,598 INFO L225 Difference]: With dead ends: 574 [2021-06-05 22:05:39,598 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 22:05:39,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 22:05:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 306. [2021-06-05 22:05:39,601 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 22:05:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-06-05 22:05:39,602 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-06-05 22:05:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:39,602 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-06-05 22:05:39,602 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 22:05:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-06-05 22:05:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:39,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:39,602 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:39,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4525,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:39,802 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:39,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1972598281, now seen corresponding path program 512 times [2021-06-05 22:05:39,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:39,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086126707] [2021-06-05 22:05:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:39,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086126707] [2021-06-05 22:05:39,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086126707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125163127] [2021-06-05 22:05:39,872 INFO L93 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 22:05:39,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:39,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:39,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:40,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125163127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:40,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:40,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642324957] [2021-06-05 22:05:40,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:40,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:40,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:40,144 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 22:05:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:40,386 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2021-06-05 22:05:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:40,386 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 22:05:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:40,387 INFO L225 Difference]: With dead ends: 536 [2021-06-05 22:05:40,387 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 22:05:40,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 22:05:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2021-06-05 22:05:40,390 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 22:05:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-06-05 22:05:40,391 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-06-05 22:05:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:40,391 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-06-05 22:05:40,391 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 22:05:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-06-05 22:05:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:40,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:40,391 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:40,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4535,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:40,592 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1030026615, now seen corresponding path program 513 times [2021-06-05 22:05:40,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:40,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585692538] [2021-06-05 22:05:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:40,660 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 22:05:40,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585692538] [2021-06-05 22:05:40,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585692538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630625114] [2021-06-05 22:05:40,660 INFO L93 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 22:05:40,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:40,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:40,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:40,916 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 22:05:40,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630625114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:40,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:40,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678357654] [2021-06-05 22:05:40,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:40,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:40,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:40,917 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 22:05:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:41,137 INFO L93 Difference]: Finished difference Result 499 states and 1442 transitions. [2021-06-05 22:05:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:41,138 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 22:05:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:41,138 INFO L225 Difference]: With dead ends: 499 [2021-06-05 22:05:41,138 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 22:05:41,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 22:05:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 296. [2021-06-05 22:05:41,141 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 22:05:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-06-05 22:05:41,142 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-06-05 22:05:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:41,142 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-06-05 22:05:41,142 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 22:05:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-06-05 22:05:41,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:41,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:41,142 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:41,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4545,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:41,343 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:41,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1993334809, now seen corresponding path program 514 times [2021-06-05 22:05:41,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:41,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19944143] [2021-06-05 22:05:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:41,407 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 22:05:41,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:41,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19944143] [2021-06-05 22:05:41,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19944143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:41,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688837255] [2021-06-05 22:05:41,407 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 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 22:05:41,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:41,718 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 22:05:41,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688837255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:41,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:41,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:41,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532063063] [2021-06-05 22:05:41,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:41,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:41,719 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 22:05:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:42,122 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2021-06-05 22:05:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:42,122 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 22:05:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:42,122 INFO L225 Difference]: With dead ends: 536 [2021-06-05 22:05:42,123 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 22:05:42,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 22:05:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2021-06-05 22:05:42,126 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 22:05:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-06-05 22:05:42,126 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-06-05 22:05:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:42,126 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-06-05 22:05:42,126 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 22:05:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-06-05 22:05:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:42,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:42,127 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:42,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:42,327 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:42,327 INFO L82 PathProgramCache]: Analyzing trace with hash 77910883, now seen corresponding path program 515 times [2021-06-05 22:05:42,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:42,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738637408] [2021-06-05 22:05:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:42,394 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 22:05:42,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:42,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738637408] [2021-06-05 22:05:42,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738637408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:42,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604584714] [2021-06-05 22:05:42,394 INFO L93 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 22:05:42,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:42,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:42,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:42,657 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 22:05:42,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604584714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:42,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:42,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:42,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718173746] [2021-06-05 22:05:42,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:42,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:42,658 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 22:05:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:43,006 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2021-06-05 22:05:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:43,006 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 22:05:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:43,007 INFO L225 Difference]: With dead ends: 513 [2021-06-05 22:05:43,007 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 22:05:43,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 22:05:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2021-06-05 22:05:43,010 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 22:05:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 22:05:43,016 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 22:05:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:43,016 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 22:05:43,016 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 22:05:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 22:05:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:43,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:43,016 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:43,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4564,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:43,217 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -25522807, now seen corresponding path program 516 times [2021-06-05 22:05:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:43,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707054279] [2021-06-05 22:05:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:43,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707054279] [2021-06-05 22:05:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707054279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647585181] [2021-06-05 22:05:43,278 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 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 22:05:43,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:43,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:43,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:43,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:43,541 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 22:05:43,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647585181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:43,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:43,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887157113] [2021-06-05 22:05:43,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:43,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:43,542 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 22:05:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:43,838 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2021-06-05 22:05:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:43,838 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 22:05:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:43,838 INFO L225 Difference]: With dead ends: 453 [2021-06-05 22:05:43,838 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 22:05:43,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 22:05:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2021-06-05 22:05:43,841 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 22:05:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 22:05:43,842 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-06-05 22:05:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:43,842 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 22:05:43,842 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 22:05:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 22:05:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:43,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:43,842 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:44,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-06-05 22:05:44,043 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:44,043 INFO L82 PathProgramCache]: Analyzing trace with hash 725877631, now seen corresponding path program 517 times [2021-06-05 22:05:44,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:44,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614819496] [2021-06-05 22:05:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614819496] [2021-06-05 22:05:44,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614819496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275915664] [2021-06-05 22:05:44,103 INFO 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 22:05:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275915664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:44,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:44,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885808782] [2021-06-05 22:05:44,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:44,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:44,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:44,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:44,362 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 22:05:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:44,654 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2021-06-05 22:05:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:44,655 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 22:05:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:44,655 INFO L225 Difference]: With dead ends: 478 [2021-06-05 22:05:44,655 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 22:05:44,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 22:05:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2021-06-05 22:05:44,658 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 22:05:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-06-05 22:05:44,659 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-06-05 22:05:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:44,659 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-06-05 22:05:44,659 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 22:05:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-06-05 22:05:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:44,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:44,659 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:44,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4581 [2021-06-05 22:05:44,860 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1189546295, now seen corresponding path program 518 times [2021-06-05 22:05:44,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:44,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608041348] [2021-06-05 22:05:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:44,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608041348] [2021-06-05 22:05:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608041348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638859894] [2021-06-05 22:05:44,925 INFO L93 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 22:05:45,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:45,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638859894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:45,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:45,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117344296] [2021-06-05 22:05:45,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:45,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:45,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:45,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:45,209 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 22:05:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:45,430 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2021-06-05 22:05:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:45,430 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 22:05:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:45,431 INFO L225 Difference]: With dead ends: 449 [2021-06-05 22:05:45,431 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 22:05:45,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 22:05:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2021-06-05 22:05:45,434 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 22:05:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 22:05:45,434 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 22:05:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:45,434 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 22:05:45,434 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 22:05:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 22:05:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:45,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:45,435 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:45,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-06-05 22:05:45,635 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash 160419753, now seen corresponding path program 519 times [2021-06-05 22:05:45,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:45,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135743140] [2021-06-05 22:05:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:45,703 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 22:05:45,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135743140] [2021-06-05 22:05:45,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135743140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260254490] [2021-06-05 22:05:45,703 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 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 22:05:45,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:45,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260254490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:45,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:45,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398805576] [2021-06-05 22:05:45,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:45,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:45,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:45,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:45,983 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 22:05:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:46,285 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2021-06-05 22:05:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:46,285 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 22:05:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:46,286 INFO L225 Difference]: With dead ends: 578 [2021-06-05 22:05:46,286 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 22:05:46,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 22:05:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2021-06-05 22:05:46,289 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 22:05:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-06-05 22:05:46,290 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-06-05 22:05:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:46,290 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-06-05 22:05:46,290 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 22:05:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-06-05 22:05:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:46,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:46,290 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:46,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4600,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:46,491 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:46,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1333487969, now seen corresponding path program 520 times [2021-06-05 22:05:46,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:46,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379045225] [2021-06-05 22:05:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:46,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:46,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379045225] [2021-06-05 22:05:46,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379045225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:46,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471173057] [2021-06-05 22:05:46,564 INFO L93 rtionOrderModulation]: Changing 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 22:05:46,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:46,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:46,804 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 22:05:46,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471173057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:46,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:46,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:46,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484891660] [2021-06-05 22:05:46,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:46,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:46,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:46,805 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 22:05:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:47,004 INFO L93 Difference]: Finished difference Result 532 states and 1515 transitions. [2021-06-05 22:05:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:47,004 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 22:05:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:47,005 INFO L225 Difference]: With dead ends: 532 [2021-06-05 22:05:47,005 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 22:05:47,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 22:05:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 307. [2021-06-05 22:05:47,008 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 22:05:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 22:05:47,009 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 22:05:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:47,009 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 22:05:47,009 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 22:05:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 22:05:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:47,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:47,009 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:47,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4609 [2021-06-05 22:05:47,210 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 911820191, now seen corresponding path program 521 times [2021-06-05 22:05:47,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:47,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688571358] [2021-06-05 22:05:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:47,286 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 22:05:47,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688571358] [2021-06-05 22:05:47,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688571358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077586690] [2021-06-05 22:05:47,286 INFO L93 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 22:05:47,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:47,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:47,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:47,552 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 22:05:47,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077586690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:47,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:47,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927525197] [2021-06-05 22:05:47,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:47,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:47,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:47,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:47,552 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 22:05:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:47,772 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2021-06-05 22:05:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:47,773 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 22:05:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:47,773 INFO L225 Difference]: With dead ends: 584 [2021-06-05 22:05:47,773 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 22:05:47,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 22:05:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2021-06-05 22:05:47,777 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 22:05:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-06-05 22:05:47,777 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-06-05 22:05:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:47,777 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-06-05 22:05:47,777 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 22:05:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-06-05 22:05:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:47,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:47,778 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:47,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4619,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:47,978 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:47,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:47,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2090804705, now seen corresponding path program 522 times [2021-06-05 22:05:47,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:47,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305033720] [2021-06-05 22:05:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:48,049 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 22:05:48,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:48,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305033720] [2021-06-05 22:05:48,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305033720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415696688] [2021-06-05 22:05:48,049 INFO L93 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 22:05:48,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:48,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:48,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415696688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:48,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975448913] [2021-06-05 22:05:48,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:48,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:48,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:48,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:48,307 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 22:05:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:48,501 INFO L93 Difference]: Finished difference Result 547 states and 1575 transitions. [2021-06-05 22:05:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:48,501 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 22:05:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:48,502 INFO L225 Difference]: With dead ends: 547 [2021-06-05 22:05:48,502 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 22:05:48,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 22:05:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 307. [2021-06-05 22:05:48,505 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 22:05:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 22:05:48,506 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 22:05:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:48,506 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 22:05:48,506 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 22:05:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 22:05:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:48,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:48,506 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:48,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:48,707 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash 932556719, now seen corresponding path program 523 times [2021-06-05 22:05:48,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:48,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363237951] [2021-06-05 22:05:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:48,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363237951] [2021-06-05 22:05:48,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363237951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128061455] [2021-06-05 22:05:48,783 INFO 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 22:05:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:49,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128061455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:49,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:49,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177085831] [2021-06-05 22:05:49,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:49,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:49,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:49,028 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 22:05:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:49,266 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2021-06-05 22:05:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:49,266 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 22:05:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:49,266 INFO L225 Difference]: With dead ends: 572 [2021-06-05 22:05:49,267 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 22:05:49,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 22:05:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2021-06-05 22:05:49,270 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 22:05:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 22:05:49,270 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 22:05:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:49,270 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 22:05:49,270 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 22:05:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 22:05:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:49,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:49,271 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:49,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4637 [2021-06-05 22:05:49,471 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash -982867207, now seen corresponding path program 524 times [2021-06-05 22:05:49,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:49,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863412013] [2021-06-05 22:05:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:49,542 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 22:05:49,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:49,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863412013] [2021-06-05 22:05:49,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863412013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385253490] [2021-06-05 22:05:49,542 INFO L93 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 22:05:49,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:49,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385253490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:49,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:49,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576148440] [2021-06-05 22:05:49,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:49,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:49,799 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 22:05:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:50,064 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2021-06-05 22:05:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:50,064 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 22:05:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:50,065 INFO L225 Difference]: With dead ends: 578 [2021-06-05 22:05:50,065 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 22:05:50,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 22:05:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2021-06-05 22:05:50,069 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 22:05:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-06-05 22:05:50,070 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-06-05 22:05:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:50,070 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-06-05 22:05:50,070 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 22:05:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-06-05 22:05:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:50,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:50,070 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:50,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:50,271 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:50,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1200608439, now seen corresponding path program 525 times [2021-06-05 22:05:50,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:50,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805367970] [2021-06-05 22:05:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:50,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805367970] [2021-06-05 22:05:50,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805367970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444205675] [2021-06-05 22:05:50,339 INFO L93 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 22:05:50,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:50,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:50,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:50,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444205675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:50,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:50,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824320068] [2021-06-05 22:05:50,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:50,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:50,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:50,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:50,603 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 22:05:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:50,779 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2021-06-05 22:05:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:50,779 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 22:05:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:50,780 INFO L225 Difference]: With dead ends: 508 [2021-06-05 22:05:50,780 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 22:05:50,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 22:05:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2021-06-05 22:05:50,783 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 22:05:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-06-05 22:05:50,784 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-06-05 22:05:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:50,784 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-06-05 22:05:50,784 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 22:05:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-06-05 22:05:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:50,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:50,784 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:50,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4657 [2021-06-05 22:05:50,985 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 91733961, now seen corresponding path program 526 times [2021-06-05 22:05:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:50,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071246391] [2021-06-05 22:05:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:51,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071246391] [2021-06-05 22:05:51,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071246391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177602492] [2021-06-05 22:05:51,053 INFO L93 rtionOrderModulation]: Changing 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 22:05:51,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177602492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:51,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210888106] [2021-06-05 22:05:51,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:51,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:51,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:51,292 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 22:05:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:51,483 INFO L93 Difference]: Finished difference Result 496 states and 1442 transitions. [2021-06-05 22:05:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:51,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:51,484 INFO L225 Difference]: With dead ends: 496 [2021-06-05 22:05:51,484 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 22:05:51,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 22:05:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 298. [2021-06-05 22:05:51,487 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 22:05:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 22:05:51,488 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 22:05:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:51,488 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 22:05:51,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 22:05:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:51,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:51,488 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:51,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:51,689 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1804131075, now seen corresponding path program 527 times [2021-06-05 22:05:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:51,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43797134] [2021-06-05 22:05:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:51,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43797134] [2021-06-05 22:05:51,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43797134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396099825] [2021-06-05 22:05:51,755 INFO L93 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 22:05:51,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:51,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:51,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:51,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396099825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:51,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:51,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678982817] [2021-06-05 22:05:51,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:51,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:51,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:51,995 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 22:05:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:52,205 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2021-06-05 22:05:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:52,205 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 22:05:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:52,206 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:05:52,206 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:05:52,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:05:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-06-05 22:05:52,208 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 22:05:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-06-05 22:05:52,209 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-06-05 22:05:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:52,209 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-06-05 22:05:52,209 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 22:05:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-06-05 22:05:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:52,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:52,209 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:52,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:52,410 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1847638207, now seen corresponding path program 528 times [2021-06-05 22:05:52,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:52,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012033818] [2021-06-05 22:05:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:52,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:52,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012033818] [2021-06-05 22:05:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012033818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:52,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713663481] [2021-06-05 22:05:52,473 INFO L93 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 22:05:52,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:52,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:52,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713663481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:52,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:52,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:52,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807268249] [2021-06-05 22:05:52,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:52,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:52,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:52,714 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 22:05:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:52,940 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2021-06-05 22:05:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:52,940 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 22:05:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:52,940 INFO L225 Difference]: With dead ends: 496 [2021-06-05 22:05:52,940 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 22:05:52,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 22:05:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2021-06-05 22:05:52,944 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 22:05:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-06-05 22:05:52,944 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-06-05 22:05:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:52,944 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-06-05 22:05:52,944 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 22:05:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-06-05 22:05:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:52,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:52,945 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:53,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:53,145 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash -67785719, now seen corresponding path program 529 times [2021-06-05 22:05:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:53,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460765043] [2021-06-05 22:05:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:53,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:53,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460765043] [2021-06-05 22:05:53,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460765043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:53,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389753959] [2021-06-05 22:05:53,213 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 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 22:05:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:53,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:53,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:53,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389753959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:53,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:53,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:53,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785124486] [2021-06-05 22:05:53,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:53,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:53,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:53,455 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 22:05:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:53,686 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2021-06-05 22:05:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:53,687 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 22:05:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:53,687 INFO L225 Difference]: With dead ends: 502 [2021-06-05 22:05:53,687 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 22:05:53,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 22:05:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2021-06-05 22:05:53,691 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 22:05:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 22:05:53,691 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 22:05:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:53,691 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 22:05:53,691 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 22:05:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 22:05:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:53,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:53,692 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:53,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:53,892 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash 972450079, now seen corresponding path program 530 times [2021-06-05 22:05:53,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:53,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644721609] [2021-06-05 22:05:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:53,956 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 22:05:53,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:53,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644721609] [2021-06-05 22:05:53,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644721609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:53,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853868839] [2021-06-05 22:05:53,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:05:54,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:54,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:54,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:54,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853868839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:54,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:54,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045442928] [2021-06-05 22:05:54,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:54,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:54,211 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 22:05:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:54,414 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2021-06-05 22:05:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:54,415 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 22:05:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:54,415 INFO L225 Difference]: With dead ends: 471 [2021-06-05 22:05:54,415 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 22:05:54,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 22:05:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2021-06-05 22:05:54,418 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 22:05:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 22:05:54,418 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 22:05:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:54,419 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 22:05:54,419 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 22:05:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 22:05:54,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:54,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:54,419 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:54,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:54,619 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1722767751, now seen corresponding path program 531 times [2021-06-05 22:05:54,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:54,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096293449] [2021-06-05 22:05:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096293449] [2021-06-05 22:05:54,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096293449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9327165] [2021-06-05 22:05:54,675 INFO L93 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 22:05:54,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:54,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9327165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:54,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572240753] [2021-06-05 22:05:54,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:54,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:54,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:54,908 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 22:05:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:55,087 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2021-06-05 22:05:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:55,087 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 22:05:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:55,088 INFO L225 Difference]: With dead ends: 443 [2021-06-05 22:05:55,088 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 22:05:55,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 22:05:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2021-06-05 22:05:55,091 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 22:05:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-06-05 22:05:55,091 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-06-05 22:05:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:55,091 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-06-05 22:05:55,091 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 22:05:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-06-05 22:05:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:55,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:55,092 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:55,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4706,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:55,292 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:55,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash -971367313, now seen corresponding path program 532 times [2021-06-05 22:05:55,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:55,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476007891] [2021-06-05 22:05:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:55,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476007891] [2021-06-05 22:05:55,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476007891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982499129] [2021-06-05 22:05:55,350 INFO L93 rtionOrderModulation]: Changing 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 22:05:55,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:55,579 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 22:05:55,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982499129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:55,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:55,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764540943] [2021-06-05 22:05:55,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:55,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:55,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:55,581 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 22:05:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:55,814 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2021-06-05 22:05:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:55,814 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 22:05:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:55,814 INFO L225 Difference]: With dead ends: 468 [2021-06-05 22:05:55,815 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 22:05:55,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 22:05:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2021-06-05 22:05:55,818 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 22:05:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-06-05 22:05:55,818 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-06-05 22:05:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:55,818 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-06-05 22:05:55,818 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 22:05:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-06-05 22:05:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:55,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:55,819 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:56,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4712 [2021-06-05 22:05:56,019 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1408176057, now seen corresponding path program 533 times [2021-06-05 22:05:56,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:56,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125140560] [2021-06-05 22:05:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:56,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125140560] [2021-06-05 22:05:56,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125140560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766802958] [2021-06-05 22:05:56,078 INFO L93 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 22:05:56,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:56,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:56,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766802958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:56,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614333657] [2021-06-05 22:05:56,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:56,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:56,317 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 22:05:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:56,484 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2021-06-05 22:05:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:56,484 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 22:05:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:56,485 INFO L225 Difference]: With dead ends: 439 [2021-06-05 22:05:56,485 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 22:05:56,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 22:05:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2021-06-05 22:05:56,488 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 22:05:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-06-05 22:05:56,488 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-06-05 22:05:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:56,488 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-06-05 22:05:56,488 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 22:05:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-06-05 22:05:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:56,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:56,489 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:56,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-06-05 22:05:56,689 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:56,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1211171353, now seen corresponding path program 534 times [2021-06-05 22:05:56,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:56,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536997815] [2021-06-05 22:05:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:56,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536997815] [2021-06-05 22:05:56,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536997815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651724204] [2021-06-05 22:05:56,746 INFO L93 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 22:05:56,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:56,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651724204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:56,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:56,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126920749] [2021-06-05 22:05:56,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:56,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:56,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:56,964 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 22:05:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:57,142 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2021-06-05 22:05:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:57,143 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 22:05:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:57,143 INFO L225 Difference]: With dead ends: 474 [2021-06-05 22:05:57,143 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 22:05:57,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 22:05:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-06-05 22:05:57,146 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 22:05:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-06-05 22:05:57,147 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-06-05 22:05:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:57,147 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-06-05 22:05:57,147 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 22:05:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-06-05 22:05:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:57,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:57,147 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:57,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4724,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:57,348 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:57,348 INFO L82 PathProgramCache]: Analyzing trace with hash -704252573, now seen corresponding path program 535 times [2021-06-05 22:05:57,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:57,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565541068] [2021-06-05 22:05:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:57,416 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 22:05:57,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565541068] [2021-06-05 22:05:57,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565541068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877284944] [2021-06-05 22:05:57,417 INFO 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 22:05:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:57,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:57,639 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 22:05:57,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877284944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:57,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:57,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:57,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119887093] [2021-06-05 22:05:57,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:57,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:57,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:57,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:57,640 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 22:05:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:57,821 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2021-06-05 22:05:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:57,821 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 22:05:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:57,822 INFO L225 Difference]: With dead ends: 474 [2021-06-05 22:05:57,822 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 22:05:57,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 22:05:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2021-06-05 22:05:57,825 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 22:05:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-06-05 22:05:57,826 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-06-05 22:05:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:57,826 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-06-05 22:05:57,826 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 22:05:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-06-05 22:05:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:57,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:57,826 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:58,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4729 [2021-06-05 22:05:58,027 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 335983225, now seen corresponding path program 536 times [2021-06-05 22:05:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:58,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825168878] [2021-06-05 22:05:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:58,084 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 22:05:58,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:58,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825168878] [2021-06-05 22:05:58,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825168878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752649226] [2021-06-05 22:05:58,085 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 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 22:05:58,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:58,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:58,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752649226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:58,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:58,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857905998] [2021-06-05 22:05:58,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:58,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:58,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:58,298 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 22:05:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:58,456 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2021-06-05 22:05:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:58,456 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 22:05:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:58,456 INFO L225 Difference]: With dead ends: 449 [2021-06-05 22:05:58,456 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 22:05:58,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 22:05:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2021-06-05 22:05:58,459 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 22:05:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 22:05:58,460 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 22:05:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:58,460 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 22:05:58,460 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 22:05:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 22:05:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:58,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:58,460 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:58,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:58,661 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -645819531, now seen corresponding path program 537 times [2021-06-05 22:05:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:58,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178914697] [2021-06-05 22:05:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:58,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:58,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178914697] [2021-06-05 22:05:58,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178914697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089665193] [2021-06-05 22:05:58,731 INFO L93 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 22:05:58,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:58,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:58,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089665193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:58,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:58,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137074763] [2021-06-05 22:05:58,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:58,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:58,988 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 22:05:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:59,342 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2021-06-05 22:05:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:59,342 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 22:05:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:59,343 INFO L225 Difference]: With dead ends: 662 [2021-06-05 22:05:59,343 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 22:05:59,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 22:05:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2021-06-05 22:05:59,347 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 22:05:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2021-06-05 22:05:59,347 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2021-06-05 22:05:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:59,347 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2021-06-05 22:05:59,347 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 22:05:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2021-06-05 22:05:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:59,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:59,348 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:59,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4738,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:59,548 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2139727253, now seen corresponding path program 538 times [2021-06-05 22:05:59,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:59,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128705621] [2021-06-05 22:05:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:59,616 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 22:05:59,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:59,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128705621] [2021-06-05 22:05:59,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128705621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:59,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374299703] [2021-06-05 22:05:59,616 INFO L93 rtionOrderModulation]: Changing 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 22:05:59,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:59,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:59,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:59,872 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 22:05:59,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374299703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:59,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:59,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:59,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642194406] [2021-06-05 22:05:59,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:59,873 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 22:06:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:00,127 INFO L93 Difference]: Finished difference Result 616 states and 1753 transitions. [2021-06-05 22:06:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:00,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:00,128 INFO L225 Difference]: With dead ends: 616 [2021-06-05 22:06:00,128 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 22:06:00,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 22:06:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 308. [2021-06-05 22:06:00,132 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 22:06:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-06-05 22:06:00,132 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-06-05 22:06:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:00,132 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-06-05 22:06:00,132 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 22:06:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-06-05 22:06:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:00,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:00,133 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:00,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4747 [2021-06-05 22:06:00,333 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash 105580907, now seen corresponding path program 539 times [2021-06-05 22:06:00,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:00,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214656038] [2021-06-05 22:06:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:00,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:00,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214656038] [2021-06-05 22:06:00,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214656038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:00,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247391223] [2021-06-05 22:06:00,404 INFO L93 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 22:06:00,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:00,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247391223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:00,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:00,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:00,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433458984] [2021-06-05 22:06:00,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:00,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:00,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:00,670 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 22:06:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:00,954 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2021-06-05 22:06:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:00,954 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 22:06:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:00,955 INFO L225 Difference]: With dead ends: 668 [2021-06-05 22:06:00,955 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 22:06:00,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 22:06:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2021-06-05 22:06:00,959 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 22:06:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-06-05 22:06:00,959 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2021-06-05 22:06:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:00,959 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-06-05 22:06:00,959 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 22:06:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-06-05 22:06:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:00,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:00,960 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:01,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4756,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:01,160 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1397923307, now seen corresponding path program 540 times [2021-06-05 22:06:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:01,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446223222] [2021-06-05 22:06:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:01,230 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 22:06:01,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:01,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446223222] [2021-06-05 22:06:01,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446223222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:01,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879337379] [2021-06-05 22:06:01,231 INFO L93 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 22:06:01,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:01,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:01,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879337379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:01,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:01,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:01,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969375464] [2021-06-05 22:06:01,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:01,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:01,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:01,487 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 22:06:01,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:01,739 INFO L93 Difference]: Finished difference Result 631 states and 1813 transitions. [2021-06-05 22:06:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:01,739 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 22:06:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:01,740 INFO L225 Difference]: With dead ends: 631 [2021-06-05 22:06:01,740 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 22:06:01,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 22:06:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-06-05 22:06:01,744 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 22:06:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-06-05 22:06:01,744 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-06-05 22:06:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:01,744 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-06-05 22:06:01,744 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 22:06:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-06-05 22:06:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:01,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:01,745 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:01,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-06-05 22:06:01,945 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash 126317435, now seen corresponding path program 541 times [2021-06-05 22:06:01,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:01,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26389473] [2021-06-05 22:06:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:02,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:02,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26389473] [2021-06-05 22:06:02,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26389473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728089507] [2021-06-05 22:06:02,013 INFO 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 22:06:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:02,254 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 22:06:02,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728089507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:02,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:02,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877945755] [2021-06-05 22:06:02,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:02,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:02,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:02,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:02,255 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 22:06:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:02,478 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2021-06-05 22:06:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:02,478 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 22:06:02,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:02,479 INFO L225 Difference]: With dead ends: 656 [2021-06-05 22:06:02,479 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 22:06:02,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 22:06:02,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2021-06-05 22:06:02,483 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 22:06:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-06-05 22:06:02,483 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-06-05 22:06:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:02,483 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-06-05 22:06:02,483 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 22:06:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-06-05 22:06:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:02,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:02,484 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:02,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:02,684 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:02,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1789106491, now seen corresponding path program 542 times [2021-06-05 22:06:02,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:02,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087667122] [2021-06-05 22:06:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:02,753 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 22:06:02,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087667122] [2021-06-05 22:06:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087667122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700270069] [2021-06-05 22:06:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:06:02,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:02,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:02,995 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 22:06:02,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700270069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:02,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:02,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037976908] [2021-06-05 22:06:02,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:02,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:02,996 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 22:06:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:03,380 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2021-06-05 22:06:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:03,380 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 22:06:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:03,381 INFO L225 Difference]: With dead ends: 662 [2021-06-05 22:06:03,381 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 22:06:03,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 22:06:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2021-06-05 22:06:03,385 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 22:06:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 22:06:03,385 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 22:06:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:03,385 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 22:06:03,385 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 22:06:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 22:06:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:03,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:03,386 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:03,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4789 [2021-06-05 22:06:03,586 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:03,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2006847723, now seen corresponding path program 543 times [2021-06-05 22:06:03,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:03,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995841619] [2021-06-05 22:06:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:03,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:03,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995841619] [2021-06-05 22:06:03,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995841619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:03,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115105880] [2021-06-05 22:06:03,657 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 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 22:06:03,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:03,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115105880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:03,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:03,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:03,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099803353] [2021-06-05 22:06:03,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:03,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:03,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:03,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:03,896 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 22:06:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:04,149 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2021-06-05 22:06:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:04,149 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 22:06:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:04,150 INFO L225 Difference]: With dead ends: 613 [2021-06-05 22:06:04,150 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 22:06:04,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 22:06:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2021-06-05 22:06:04,153 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 22:06:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2021-06-05 22:06:04,154 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2021-06-05 22:06:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:04,154 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2021-06-05 22:06:04,154 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 22:06:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2021-06-05 22:06:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:04,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:04,154 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:04,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4802,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:04,355 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash -714505323, now seen corresponding path program 544 times [2021-06-05 22:06:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:04,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799980416] [2021-06-05 22:06:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:04,427 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 22:06:04,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799980416] [2021-06-05 22:06:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799980416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143951709] [2021-06-05 22:06:04,427 INFO L93 rtionOrderModulation]: Changing 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 22:06:04,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:04,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:04,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143951709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:04,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:04,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:04,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41750295] [2021-06-05 22:06:04,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:04,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:04,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:04,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:04,694 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 22:06:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:04,981 INFO L93 Difference]: Finished difference Result 601 states and 1749 transitions. [2021-06-05 22:06:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:04,981 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 22:06:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:04,982 INFO L225 Difference]: With dead ends: 601 [2021-06-05 22:06:04,982 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 22:06:04,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 22:06:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 312. [2021-06-05 22:06:04,985 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 22:06:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-06-05 22:06:04,986 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2021-06-05 22:06:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:04,986 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-06-05 22:06:04,986 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 22:06:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-06-05 22:06:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:04,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:04,986 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:05,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4809 [2021-06-05 22:06:05,187 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1684596937, now seen corresponding path program 545 times [2021-06-05 22:06:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:05,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044033664] [2021-06-05 22:06:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:05,255 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 22:06:05,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:05,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044033664] [2021-06-05 22:06:05,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044033664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:05,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249455528] [2021-06-05 22:06:05,255 INFO L93 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 22:06:05,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:05,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:05,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249455528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:05,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:05,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:05,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242533489] [2021-06-05 22:06:05,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:05,495 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 22:06:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:05,707 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2021-06-05 22:06:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:05,707 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 22:06:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:05,708 INFO L225 Difference]: With dead ends: 556 [2021-06-05 22:06:05,708 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 22:06:05,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 22:06:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2021-06-05 22:06:05,711 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 22:06:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 22:06:05,711 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 22:06:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:05,712 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 22:06:05,712 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 22:06:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 22:06:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:05,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:05,712 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:05,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4819 [2021-06-05 22:06:05,912 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:05,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1041398923, now seen corresponding path program 546 times [2021-06-05 22:06:05,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:05,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242655618] [2021-06-05 22:06:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:05,990 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 22:06:05,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242655618] [2021-06-05 22:06:05,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242655618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903557267] [2021-06-05 22:06:05,991 INFO L93 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 22:06:06,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:06,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903557267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:06,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:06,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712962431] [2021-06-05 22:06:06,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:06,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:06,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:06,278 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 22:06:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:06,615 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2021-06-05 22:06:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:06,615 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 22:06:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:06,616 INFO L225 Difference]: With dead ends: 595 [2021-06-05 22:06:06,616 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 22:06:06,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 22:06:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2021-06-05 22:06:06,620 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 22:06:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2021-06-05 22:06:06,620 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2021-06-05 22:06:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:06,620 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2021-06-05 22:06:06,620 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 22:06:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2021-06-05 22:06:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:06,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:06,621 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:06,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4825,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:06,821 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:06,821 INFO L82 PathProgramCache]: Analyzing trace with hash -874025003, now seen corresponding path program 547 times [2021-06-05 22:06:06,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:06,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642267514] [2021-06-05 22:06:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:06,887 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 22:06:06,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:06,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642267514] [2021-06-05 22:06:06,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642267514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:06,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511051240] [2021-06-05 22:06:06,887 INFO 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 22:06:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:06,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:07,140 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 22:06:07,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511051240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:07,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:07,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:07,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419897039] [2021-06-05 22:06:07,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:07,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:07,141 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 22:06:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:07,425 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2021-06-05 22:06:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:07,425 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 22:06:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:07,426 INFO L225 Difference]: With dead ends: 601 [2021-06-05 22:06:07,426 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 22:06:07,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 22:06:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2021-06-05 22:06:07,431 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 22:06:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-06-05 22:06:07,431 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-06-05 22:06:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:07,431 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-06-05 22:06:07,431 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 22:06:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-06-05 22:06:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:07,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:07,432 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:07,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4834 [2021-06-05 22:06:07,644 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash 166210795, now seen corresponding path program 548 times [2021-06-05 22:06:07,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:07,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061035787] [2021-06-05 22:06:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:07,712 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 22:06:07,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:07,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061035787] [2021-06-05 22:06:07,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061035787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:07,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060732268] [2021-06-05 22:06:07,712 INFO L93 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 22:06:07,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:07,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060732268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:07,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:07,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:07,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177493834] [2021-06-05 22:06:07,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:07,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:07,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:07,955 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 22:06:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:08,218 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-06-05 22:06:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:08,218 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 22:06:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:08,219 INFO L225 Difference]: With dead ends: 576 [2021-06-05 22:06:08,219 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 22:06:08,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 22:06:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2021-06-05 22:06:08,223 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 22:06:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2021-06-05 22:06:08,223 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2021-06-05 22:06:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:08,223 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2021-06-05 22:06:08,223 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 22:06:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2021-06-05 22:06:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:08,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:08,223 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:08,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4842,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:08,424 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1015185865, now seen corresponding path program 549 times [2021-06-05 22:06:08,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:08,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099972837] [2021-06-05 22:06:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:08,491 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 22:06:08,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:08,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099972837] [2021-06-05 22:06:08,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099972837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:08,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133405583] [2021-06-05 22:06:08,491 INFO L93 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 22:06:08,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:08,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133405583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:08,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022228017] [2021-06-05 22:06:08,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:08,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:08,731 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 22:06:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:08,979 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2021-06-05 22:06:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:08,980 INFO L225 Difference]: With dead ends: 600 [2021-06-05 22:06:08,980 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 22:06:08,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 22:06:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2021-06-05 22:06:08,983 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 22:06:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-06-05 22:06:08,984 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-06-05 22:06:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:08,984 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-06-05 22:06:08,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-06-05 22:06:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:08,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:08,984 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:09,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4847 [2021-06-05 22:06:09,185 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1987439031, now seen corresponding path program 550 times [2021-06-05 22:06:09,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:09,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019498322] [2021-06-05 22:06:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:09,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019498322] [2021-06-05 22:06:09,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019498322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961113430] [2021-06-05 22:06:09,251 INFO L93 rtionOrderModulation]: Changing 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 22:06:09,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:09,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:09,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:09,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:09,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961113430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:09,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:09,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:09,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32315830] [2021-06-05 22:06:09,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:09,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:09,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:09,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:09,510 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 22:06:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:09,760 INFO L93 Difference]: Finished difference Result 602 states and 1742 transitions. [2021-06-05 22:06:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:09,760 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 22:06:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:09,761 INFO L225 Difference]: With dead ends: 602 [2021-06-05 22:06:09,761 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 22:06:09,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 22:06:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 310. [2021-06-05 22:06:09,764 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 22:06:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2021-06-05 22:06:09,765 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2021-06-05 22:06:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:09,765 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2021-06-05 22:06:09,765 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 22:06:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2021-06-05 22:06:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:09,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:09,765 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:09,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4855,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:09,965 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash 411663229, now seen corresponding path program 551 times [2021-06-05 22:06:09,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:09,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882155432] [2021-06-05 22:06:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:10,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:10,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882155432] [2021-06-05 22:06:10,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882155432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:10,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365316192] [2021-06-05 22:06:10,030 INFO L93 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 22:06:10,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:10,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:10,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:10,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:10,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365316192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:10,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:10,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:10,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856049094] [2021-06-05 22:06:10,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:10,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:10,263 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 22:06:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:10,463 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2021-06-05 22:06:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:10,463 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 22:06:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:10,464 INFO L225 Difference]: With dead ends: 547 [2021-06-05 22:06:10,464 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 22:06:10,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 22:06:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2021-06-05 22:06:10,467 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 22:06:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-06-05 22:06:10,468 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-06-05 22:06:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:10,468 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-06-05 22:06:10,468 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 22:06:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-06-05 22:06:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:10,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:10,468 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:10,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:10,669 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499755, now seen corresponding path program 552 times [2021-06-05 22:06:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:10,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567506196] [2021-06-05 22:06:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:10,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:10,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567506196] [2021-06-05 22:06:10,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567506196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:10,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559642980] [2021-06-05 22:06:10,730 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 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 22:06:10,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:10,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:10,951 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 22:06:10,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559642980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:10,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:10,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:06:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636181547] [2021-06-05 22:06:10,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:10,952 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 22:06:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:11,186 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2021-06-05 22:06:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:11,186 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 22:06:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:11,187 INFO L225 Difference]: With dead ends: 570 [2021-06-05 22:06:11,187 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 22:06:11,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 22:06:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2021-06-05 22:06:11,190 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 22:06:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 22:06:11,190 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 22:06:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:11,190 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 22:06:11,190 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 22:06:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 22:06:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:11,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:11,191 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:11,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:11,391 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -868001639, now seen corresponding path program 553 times [2021-06-05 22:06:11,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:11,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993200145] [2021-06-05 22:06:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:11,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:11,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993200145] [2021-06-05 22:06:11,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993200145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:11,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017244018] [2021-06-05 22:06:11,450 INFO 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 22:06:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:11,684 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 22:06:11,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017244018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:11,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:11,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:06:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090826731] [2021-06-05 22:06:11,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:11,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:11,685 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 22:06:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:11,968 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2021-06-05 22:06:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:11,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:11,969 INFO L225 Difference]: With dead ends: 635 [2021-06-05 22:06:11,969 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 22:06:11,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 22:06:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2021-06-05 22:06:11,972 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 22:06:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2021-06-05 22:06:11,973 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2021-06-05 22:06:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:11,973 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2021-06-05 22:06:11,973 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 22:06:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2021-06-05 22:06:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:11,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:11,973 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:12,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4872,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:12,174 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1511541731, now seen corresponding path program 554 times [2021-06-05 22:06:12,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:12,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054303579] [2021-06-05 22:06:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:12,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:12,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054303579] [2021-06-05 22:06:12,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054303579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:12,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362818154] [2021-06-05 22:06:12,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:06:12,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:12,463 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 22:06:12,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362818154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:12,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:12,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:06:12,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647998862] [2021-06-05 22:06:12,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:12,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:12,464 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 22:06:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:12,785 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2021-06-05 22:06:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:12,785 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 22:06:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:12,786 INFO L225 Difference]: With dead ends: 641 [2021-06-05 22:06:12,786 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 22:06:12,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 22:06:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2021-06-05 22:06:12,789 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 22:06:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2021-06-05 22:06:12,790 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2021-06-05 22:06:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:12,790 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2021-06-05 22:06:12,790 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 22:06:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2021-06-05 22:06:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:12,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:12,790 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:12,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4880,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:12,991 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1743189767, now seen corresponding path program 555 times [2021-06-05 22:06:12,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:12,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586737376] [2021-06-05 22:06:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:13,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:13,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586737376] [2021-06-05 22:06:13,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586737376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:13,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573917148] [2021-06-05 22:06:13,052 INFO L93 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 22:06:13,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:13,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573917148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:13,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:13,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:06:13,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979475816] [2021-06-05 22:06:13,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:13,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:13,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:13,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:13,271 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 22:06:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:13,523 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2021-06-05 22:06:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:13,523 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 22:06:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:13,524 INFO L225 Difference]: With dead ends: 624 [2021-06-05 22:06:13,524 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 22:06:13,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 22:06:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2021-06-05 22:06:13,527 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 22:06:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2021-06-05 22:06:13,528 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2021-06-05 22:06:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:13,528 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2021-06-05 22:06:13,528 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 22:06:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2021-06-05 22:06:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:13,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:13,528 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:13,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:13,729 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash 16863173, now seen corresponding path program 556 times [2021-06-05 22:06:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:13,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438738283] [2021-06-05 22:06:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:13,790 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 22:06:13,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:13,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438738283] [2021-06-05 22:06:13,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438738283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:13,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042831652] [2021-06-05 22:06:13,791 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 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 22:06:13,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:13,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:14,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042831652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:14,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:14,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:14,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308184007] [2021-06-05 22:06:14,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:14,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:14,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:14,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:14,009 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 22:06:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:14,257 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2021-06-05 22:06:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:14,257 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 22:06:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:14,258 INFO L225 Difference]: With dead ends: 649 [2021-06-05 22:06:14,258 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 22:06:14,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 22:06:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2021-06-05 22:06:14,262 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 22:06:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 22:06:14,262 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 22:06:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:14,262 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 22:06:14,262 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 22:06:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 22:06:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:14,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:14,262 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:14,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4894,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:14,463 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:14,463 INFO L82 PathProgramCache]: Analyzing trace with hash -784643029, now seen corresponding path program 557 times [2021-06-05 22:06:14,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:14,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108821532] [2021-06-05 22:06:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:14,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108821532] [2021-06-05 22:06:14,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108821532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530966825] [2021-06-05 22:06:14,514 INFO L93 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 22:06:14,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:14,735 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 22:06:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530966825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:14,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:14,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:14,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563272767] [2021-06-05 22:06:14,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:14,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:14,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:14,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:14,736 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 22:06:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:14,939 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2021-06-05 22:06:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:14,939 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 22:06:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:14,939 INFO L225 Difference]: With dead ends: 446 [2021-06-05 22:06:14,939 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 22:06:14,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 22:06:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-06-05 22:06:14,942 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 22:06:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 22:06:14,943 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 22:06:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:14,943 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 22:06:14,943 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 22:06:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 22:06:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:14,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:14,943 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:15,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4899,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:15,144 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash -33242591, now seen corresponding path program 558 times [2021-06-05 22:06:15,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:15,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664716316] [2021-06-05 22:06:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:15,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:15,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664716316] [2021-06-05 22:06:15,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664716316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522232578] [2021-06-05 22:06:15,196 INFO L93 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 22:06:15,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:15,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:15,417 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 22:06:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522232578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:15,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:15,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688364614] [2021-06-05 22:06:15,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:15,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:15,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:15,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:15,418 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 22:06:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:15,680 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2021-06-05 22:06:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:15,680 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 22:06:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:15,681 INFO L225 Difference]: With dead ends: 471 [2021-06-05 22:06:15,681 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 22:06:15,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 22:06:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-06-05 22:06:15,685 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 22:06:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 22:06:15,686 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 22:06:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:15,686 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 22:06:15,686 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 22:06:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 22:06:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:15,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:15,687 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:15,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4907 [2021-06-05 22:06:15,911 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1948666517, now seen corresponding path program 559 times [2021-06-05 22:06:15,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:15,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391453196] [2021-06-05 22:06:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:15,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:15,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391453196] [2021-06-05 22:06:15,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391453196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883117746] [2021-06-05 22:06:15,964 INFO 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 22:06:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:16,200 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 22:06:16,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883117746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:16,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:16,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185660122] [2021-06-05 22:06:16,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:16,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:16,201 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 22:06:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:16,390 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2021-06-05 22:06:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:16,390 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 22:06:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:16,391 INFO L225 Difference]: With dead ends: 442 [2021-06-05 22:06:16,391 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 22:06:16,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 22:06:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2021-06-05 22:06:16,394 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 22:06:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 22:06:16,394 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 22:06:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:16,395 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 22:06:16,395 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 22:06:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 22:06:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:16,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:16,395 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:16,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4912 [2021-06-05 22:06:16,595 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2145671221, now seen corresponding path program 560 times [2021-06-05 22:06:16,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:16,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081568445] [2021-06-05 22:06:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:16,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:16,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081568445] [2021-06-05 22:06:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081568445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:16,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227808305] [2021-06-05 22:06:16,648 INFO L93 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 22:06:16,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:16,855 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 22:06:16,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227808305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:16,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:16,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:16,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224307587] [2021-06-05 22:06:16,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:16,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:16,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:16,855 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 22:06:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:17,020 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2021-06-05 22:06:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:17,020 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 22:06:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:17,021 INFO L225 Difference]: With dead ends: 477 [2021-06-05 22:06:17,021 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 22:06:17,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 22:06:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2021-06-05 22:06:17,024 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 22:06:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-06-05 22:06:17,025 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-06-05 22:06:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:17,025 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-06-05 22:06:17,025 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 22:06:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-06-05 22:06:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:17,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:17,025 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:17,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4918 [2021-06-05 22:06:17,226 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash 233872149, now seen corresponding path program 561 times [2021-06-05 22:06:17,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:17,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880138632] [2021-06-05 22:06:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:17,279 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 22:06:17,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880138632] [2021-06-05 22:06:17,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880138632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042071775] [2021-06-05 22:06:17,280 INFO L93 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 22:06:17,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:17,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:17,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:17,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:17,482 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 22:06:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042071775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:17,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754558692] [2021-06-05 22:06:17,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:17,483 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 22:06:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:17,669 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2021-06-05 22:06:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:17,669 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 22:06:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:17,670 INFO L225 Difference]: With dead ends: 477 [2021-06-05 22:06:17,670 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 22:06:17,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 22:06:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2021-06-05 22:06:17,673 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 22:06:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-06-05 22:06:17,673 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-06-05 22:06:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:17,673 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-06-05 22:06:17,673 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 22:06:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-06-05 22:06:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:17,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:17,674 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:17,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-06-05 22:06:17,874 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1274107947, now seen corresponding path program 562 times [2021-06-05 22:06:17,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:17,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115309024] [2021-06-05 22:06:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:17,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115309024] [2021-06-05 22:06:17,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115309024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749409488] [2021-06-05 22:06:17,928 INFO L93 rtionOrderModulation]: Changing 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 22:06:18,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:18,128 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 22:06:18,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749409488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:18,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:18,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795643898] [2021-06-05 22:06:18,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:18,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:18,129 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 22:06:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:18,308 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2021-06-05 22:06:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:18,308 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 22:06:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:18,309 INFO L225 Difference]: With dead ends: 452 [2021-06-05 22:06:18,309 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 22:06:18,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 22:06:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2021-06-05 22:06:18,312 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 22:06:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-06-05 22:06:18,312 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-06-05 22:06:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:18,312 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-06-05 22:06:18,312 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 22:06:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-06-05 22:06:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:18,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:18,313 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:18,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4927,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:18,513 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash 876362367, now seen corresponding path program 563 times [2021-06-05 22:06:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882408828] [2021-06-05 22:06:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:18,567 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 22:06:18,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:18,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882408828] [2021-06-05 22:06:18,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882408828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001488330] [2021-06-05 22:06:18,567 INFO L93 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 22:06:18,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:18,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:18,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:18,769 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 22:06:18,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001488330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:18,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:18,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314364031] [2021-06-05 22:06:18,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:18,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:18,769 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 22:06:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:18,959 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2021-06-05 22:06:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:18,959 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 22:06:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:18,960 INFO L225 Difference]: With dead ends: 536 [2021-06-05 22:06:18,960 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 22:06:18,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 22:06:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2021-06-05 22:06:18,963 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 22:06:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2021-06-05 22:06:18,964 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2021-06-05 22:06:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:18,964 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2021-06-05 22:06:18,964 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 22:06:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2021-06-05 22:06:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:18,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:18,964 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:19,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-06-05 22:06:19,165 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1039061559, now seen corresponding path program 564 times [2021-06-05 22:06:19,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:19,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204697346] [2021-06-05 22:06:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:19,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:19,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204697346] [2021-06-05 22:06:19,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204697346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:19,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117547730] [2021-06-05 22:06:19,220 INFO L93 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 22:06:19,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:19,420 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 22:06:19,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117547730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:19,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:19,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:19,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841277430] [2021-06-05 22:06:19,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:19,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:19,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:19,421 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 22:06:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:19,625 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2021-06-05 22:06:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:19,626 INFO L225 Difference]: With dead ends: 536 [2021-06-05 22:06:19,626 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 22:06:19,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 22:06:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2021-06-05 22:06:19,630 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 22:06:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-06-05 22:06:19,630 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2021-06-05 22:06:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:19,630 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-06-05 22:06:19,630 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 22:06:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-06-05 22:06:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:19,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:19,631 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:19,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4934,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:19,831 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1174239, now seen corresponding path program 565 times [2021-06-05 22:06:19,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:19,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336878550] [2021-06-05 22:06:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:19,891 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 22:06:19,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336878550] [2021-06-05 22:06:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336878550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219822153] [2021-06-05 22:06:19,892 INFO 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 22:06:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:20,088 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 22:06:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219822153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:20,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:20,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314246101] [2021-06-05 22:06:20,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:20,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:20,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:20,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:20,089 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 22:06:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:20,260 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2021-06-05 22:06:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:20,260 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 22:06:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:20,261 INFO L225 Difference]: With dead ends: 525 [2021-06-05 22:06:20,261 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 22:06:20,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 22:06:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2021-06-05 22:06:20,264 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 22:06:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2021-06-05 22:06:20,265 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2021-06-05 22:06:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:20,265 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2021-06-05 22:06:20,265 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 22:06:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2021-06-05 22:06:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:20,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:20,265 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:20,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4939 [2021-06-05 22:06:20,466 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1761227179, now seen corresponding path program 566 times [2021-06-05 22:06:20,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:20,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402333867] [2021-06-05 22:06:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:20,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:20,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402333867] [2021-06-05 22:06:20,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402333867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957935288] [2021-06-05 22:06:20,521 INFO L93 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 22:06:20,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:20,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:20,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:20,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:20,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957935288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:20,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:20,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499878271] [2021-06-05 22:06:20,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:20,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:20,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:20,707 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 22:06:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:20,879 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2021-06-05 22:06:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:20,880 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 22:06:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:20,880 INFO L225 Difference]: With dead ends: 515 [2021-06-05 22:06:20,880 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 22:06:20,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 22:06:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2021-06-05 22:06:20,883 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 22:06:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 22:06:20,884 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 22:06:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:20,884 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 22:06:20,884 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 22:06:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 22:06:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:20,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:20,884 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:21,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4942 [2021-06-05 22:06:21,085 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1171432537, now seen corresponding path program 567 times [2021-06-05 22:06:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:21,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136431787] [2021-06-05 22:06:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:21,129 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 22:06:21,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:21,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136431787] [2021-06-05 22:06:21,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136431787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040577686] [2021-06-05 22:06:21,130 INFO L93 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 22:06:21,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:21,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:21,334 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 22:06:21,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040577686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:21,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:21,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248242200] [2021-06-05 22:06:21,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:21,335 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 22:06:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:21,585 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2021-06-05 22:06:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:21,585 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 22:06:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:21,586 INFO L225 Difference]: With dead ends: 491 [2021-06-05 22:06:21,586 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 22:06:21,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 22:06:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2021-06-05 22:06:21,589 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 22:06:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 22:06:21,589 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 22:06:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:21,589 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 22:06:21,589 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 22:06:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 22:06:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:21,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:21,590 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:21,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:21,790 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:21,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1111178657, now seen corresponding path program 568 times [2021-06-05 22:06:21,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:21,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808523492] [2021-06-05 22:06:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:21,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:21,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808523492] [2021-06-05 22:06:21,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808523492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522144870] [2021-06-05 22:06:21,838 INFO L93 rtionOrderModulation]: Changing 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 22:06:21,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:21,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:22,055 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 22:06:22,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522144870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:22,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:22,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929036685] [2021-06-05 22:06:22,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:22,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:22,056 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 22:06:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:22,345 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2021-06-05 22:06:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:22,345 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 22:06:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:22,345 INFO L225 Difference]: With dead ends: 487 [2021-06-05 22:06:22,346 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 22:06:22,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 22:06:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2021-06-05 22:06:22,349 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 22:06:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 22:06:22,349 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 22:06:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:22,349 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 22:06:22,349 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 22:06:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 22:06:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:22,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:22,350 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:22,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4951 [2021-06-05 22:06:22,550 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:22,550 INFO L82 PathProgramCache]: Analyzing trace with hash -359778219, now seen corresponding path program 569 times [2021-06-05 22:06:22,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:22,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213390980] [2021-06-05 22:06:22,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:22,600 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 22:06:22,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213390980] [2021-06-05 22:06:22,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213390980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492311074] [2021-06-05 22:06:22,601 INFO L93 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 22:06:22,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492311074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307193838] [2021-06-05 22:06:22,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:22,825 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 22:06:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:23,257 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2021-06-05 22:06:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:23,257 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 22:06:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:23,258 INFO L225 Difference]: With dead ends: 512 [2021-06-05 22:06:23,258 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 22:06:23,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 22:06:23,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2021-06-05 22:06:23,262 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 22:06:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 22:06:23,262 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 22:06:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:23,262 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 22:06:23,262 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 22:06:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 22:06:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:23,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:23,263 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:23,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4956 [2021-06-05 22:06:23,463 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:23,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:23,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2019765151, now seen corresponding path program 570 times [2021-06-05 22:06:23,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:23,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284277986] [2021-06-05 22:06:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:23,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:23,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284277986] [2021-06-05 22:06:23,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284277986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:23,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96059897] [2021-06-05 22:06:23,514 INFO L93 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 22:06:23,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:23,730 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 22:06:23,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96059897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:23,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:23,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:23,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189157808] [2021-06-05 22:06:23,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:23,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:23,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:23,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:23,731 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 22:06:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:24,022 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-06-05 22:06:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:24,023 INFO L225 Difference]: With dead ends: 483 [2021-06-05 22:06:24,023 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 22:06:24,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 22:06:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2021-06-05 22:06:24,026 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 22:06:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-06-05 22:06:24,026 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-06-05 22:06:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:24,026 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-06-05 22:06:24,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-06-05 22:06:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:24,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:24,027 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:24,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4962,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:24,227 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:24,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1747645511, now seen corresponding path program 571 times [2021-06-05 22:06:24,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:24,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101230866] [2021-06-05 22:06:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:24,278 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 22:06:24,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101230866] [2021-06-05 22:06:24,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101230866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050252465] [2021-06-05 22:06:24,279 INFO 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 22:06:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:24,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:24,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:24,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050252465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:24,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:24,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362149635] [2021-06-05 22:06:24,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:24,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:24,488 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 22:06:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:24,724 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2021-06-05 22:06:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:24,724 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 22:06:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:24,724 INFO L225 Difference]: With dead ends: 432 [2021-06-05 22:06:24,724 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 22:06:24,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 22:06:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2021-06-05 22:06:24,727 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 22:06:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 22:06:24,727 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 22:06:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:24,728 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 22:06:24,728 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 22:06:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 22:06:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:24,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:24,728 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:24,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4967 [2021-06-05 22:06:24,928 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:24,929 INFO L82 PathProgramCache]: Analyzing trace with hash -996245073, now seen corresponding path program 572 times [2021-06-05 22:06:24,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:24,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113000695] [2021-06-05 22:06:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:24,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113000695] [2021-06-05 22:06:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113000695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131070341] [2021-06-05 22:06:24,974 INFO L93 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 22:06:25,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:25,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:25,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:25,181 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 22:06:25,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131070341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:25,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:25,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481672734] [2021-06-05 22:06:25,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:25,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:25,182 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 22:06:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:25,457 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2021-06-05 22:06:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:25,457 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 22:06:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:25,457 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:06:25,457 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:06:25,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:06:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2021-06-05 22:06:25,461 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 22:06:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 22:06:25,461 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 22:06:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:25,461 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 22:06:25,461 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 22:06:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 22:06:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:25,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:25,461 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:25,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:25,662 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1383298297, now seen corresponding path program 573 times [2021-06-05 22:06:25,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:25,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633410240] [2021-06-05 22:06:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:25,711 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 22:06:25,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:25,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633410240] [2021-06-05 22:06:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633410240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383749476] [2021-06-05 22:06:25,711 INFO L93 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 22:06:25,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:25,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:25,913 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 22:06:25,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383749476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:25,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:25,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812045182] [2021-06-05 22:06:25,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:25,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:25,914 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 22:06:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:26,129 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-06-05 22:06:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:26,129 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 22:06:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:26,130 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:06:26,130 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 22:06:26,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 22:06:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2021-06-05 22:06:26,133 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 22:06:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 22:06:26,133 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 22:06:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:26,133 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 22:06:26,133 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 22:06:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 22:06:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:26,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:26,134 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:26,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4981 [2021-06-05 22:06:26,334 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:26,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1186293593, now seen corresponding path program 574 times [2021-06-05 22:06:26,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:26,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694512442] [2021-06-05 22:06:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:26,381 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 22:06:26,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:26,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694512442] [2021-06-05 22:06:26,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694512442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:26,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895529650] [2021-06-05 22:06:26,382 INFO L93 rtionOrderModulation]: Changing 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 22:06:26,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:26,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:26,573 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 22:06:26,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895529650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:26,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:26,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:26,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611128685] [2021-06-05 22:06:26,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:26,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:26,573 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 22:06:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:26,777 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2021-06-05 22:06:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:26,777 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 22:06:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:26,778 INFO L225 Difference]: With dead ends: 463 [2021-06-05 22:06:26,778 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:06:26,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:06:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2021-06-05 22:06:26,781 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 22:06:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-06-05 22:06:26,781 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-06-05 22:06:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:26,781 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-06-05 22:06:26,782 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 22:06:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-06-05 22:06:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:26,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:26,782 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:26,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:26,982 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -729130333, now seen corresponding path program 575 times [2021-06-05 22:06:26,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:26,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213087268] [2021-06-05 22:06:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:27,030 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 22:06:27,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213087268] [2021-06-05 22:06:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213087268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592115234] [2021-06-05 22:06:27,030 INFO L93 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 22:06:27,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:27,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:27,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:27,237 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 22:06:27,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592115234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:27,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:27,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850113286] [2021-06-05 22:06:27,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:27,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:27,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:27,238 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 22:06:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:27,476 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2021-06-05 22:06:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:27,477 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 22:06:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:27,477 INFO L225 Difference]: With dead ends: 463 [2021-06-05 22:06:27,477 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 22:06:27,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 22:06:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2021-06-05 22:06:27,480 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 22:06:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-06-05 22:06:27,481 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-06-05 22:06:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:27,481 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-06-05 22:06:27,481 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 22:06:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-06-05 22:06:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:27,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:27,481 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:27,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4991 [2021-06-05 22:06:27,682 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash 311105465, now seen corresponding path program 576 times [2021-06-05 22:06:27,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:27,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605856515] [2021-06-05 22:06:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:27,729 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 22:06:27,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605856515] [2021-06-05 22:06:27,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605856515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203311989] [2021-06-05 22:06:27,730 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 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 22:06:27,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:27,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:27,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:27,902 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 22:06:27,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203311989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:27,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:06:27,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494157244] [2021-06-05 22:06:27,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:06:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:27,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:06:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:06:27,903 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 22:06:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:28,090 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2021-06-05 22:06:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:28,090 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 22:06:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:28,091 INFO L225 Difference]: With dead ends: 438 [2021-06-05 22:06:28,091 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 22:06:28,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 22:06:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2021-06-05 22:06:28,094 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 22:06:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 22:06:28,094 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 22:06:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:28,094 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 22:06:28,094 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 22:06:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 22:06:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:28,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:28,095 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:28,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4996,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:28,295 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:28,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2009828929, now seen corresponding path program 577 times [2021-06-05 22:06:28,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:28,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518014402] [2021-06-05 22:06:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:28,340 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 22:06:28,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:28,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518014402] [2021-06-05 22:06:28,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518014402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:28,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269960855] [2021-06-05 22:06:28,340 INFO 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 22:06:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:28,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:28,543 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 22:06:28,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269960855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:28,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:28,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:28,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529391942] [2021-06-05 22:06:28,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:28,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:28,544 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 22:06:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:28,775 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2021-06-05 22:06:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:28,775 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 22:06:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:28,775 INFO L225 Difference]: With dead ends: 422 [2021-06-05 22:06:28,775 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 22:06:28,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 22:06:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2021-06-05 22:06:28,778 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 22:06:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 22:06:28,778 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 22:06:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:28,779 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 22:06:28,779 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 22:06:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 22:06:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:28,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:28,779 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:28,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4998 [2021-06-05 22:06:28,979 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:28,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1533737929, now seen corresponding path program 578 times [2021-06-05 22:06:28,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:28,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262524422] [2021-06-05 22:06:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:29,025 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 22:06:29,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:29,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262524422] [2021-06-05 22:06:29,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262524422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042035324] [2021-06-05 22:06:29,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:06:29,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:29,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042035324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:29,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:29,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231333249] [2021-06-05 22:06:29,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:29,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:29,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:29,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:29,230 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 22:06:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:29,506 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2021-06-05 22:06:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:29,506 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 22:06:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:29,506 INFO L225 Difference]: With dead ends: 447 [2021-06-05 22:06:29,507 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 22:06:29,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 22:06:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2021-06-05 22:06:29,510 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 22:06:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 22:06:29,510 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 22:06:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:29,510 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 22:06:29,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 22:06:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:29,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:29,511 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:29,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5006,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:29,711 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 845805441, now seen corresponding path program 579 times [2021-06-05 22:06:29,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:29,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42608231] [2021-06-05 22:06:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42608231] [2021-06-05 22:06:29,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42608231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334581982] [2021-06-05 22:06:29,760 INFO L93 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 22:06:29,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:29,958 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 22:06:29,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334581982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:29,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:29,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321369666] [2021-06-05 22:06:29,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:29,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:29,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:29,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:29,958 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 22:06:30,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:30,176 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2021-06-05 22:06:30,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:30,176 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 22:06:30,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:30,177 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:06:30,177 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 22:06:30,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 22:06:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2021-06-05 22:06:30,180 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 22:06:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 22:06:30,180 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 22:06:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:30,180 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 22:06:30,180 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 22:06:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 22:06:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:30,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:30,180 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:30,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-06-05 22:06:30,381 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:30,381 INFO L82 PathProgramCache]: Analyzing trace with hash 648800737, now seen corresponding path program 580 times [2021-06-05 22:06:30,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:30,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600250194] [2021-06-05 22:06:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:30,428 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 22:06:30,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:30,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600250194] [2021-06-05 22:06:30,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600250194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:30,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542437479] [2021-06-05 22:06:30,428 INFO L93 rtionOrderModulation]: Changing 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 22:06:30,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:30,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:30,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:30,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542437479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:30,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:30,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870959767] [2021-06-05 22:06:30,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:30,615 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 22:06:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:30,810 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2021-06-05 22:06:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:30,811 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 22:06:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:30,811 INFO L225 Difference]: With dead ends: 453 [2021-06-05 22:06:30,811 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 22:06:30,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 22:06:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2021-06-05 22:06:30,814 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 22:06:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-06-05 22:06:30,815 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-06-05 22:06:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:30,815 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-06-05 22:06:30,815 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 22:06:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-06-05 22:06:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:30,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:30,815 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:31,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5021 [2021-06-05 22:06:31,016 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:31,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1266623189, now seen corresponding path program 581 times [2021-06-05 22:06:31,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:31,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932449486] [2021-06-05 22:06:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:31,064 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 22:06:31,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:31,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932449486] [2021-06-05 22:06:31,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932449486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141187947] [2021-06-05 22:06:31,064 INFO L93 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 22:06:31,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:31,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:31,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141187947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:31,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:31,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632592655] [2021-06-05 22:06:31,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:31,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:31,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:31,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:31,250 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 22:06:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:31,504 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2021-06-05 22:06:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:31,505 INFO L225 Difference]: With dead ends: 453 [2021-06-05 22:06:31,505 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 22:06:31,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 22:06:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2021-06-05 22:06:31,508 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 22:06:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-06-05 22:06:31,508 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-06-05 22:06:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:31,508 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-06-05 22:06:31,508 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 22:06:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-06-05 22:06:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:31,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:31,509 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:31,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5027,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:31,709 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash -226387391, now seen corresponding path program 582 times [2021-06-05 22:06:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:31,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296196296] [2021-06-05 22:06:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:31,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296196296] [2021-06-05 22:06:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296196296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733025700] [2021-06-05 22:06:31,757 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 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 22:06:31,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:31,946 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 22:06:31,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733025700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:31,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:31,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189901695] [2021-06-05 22:06:31,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:31,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:31,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:31,947 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 22:06:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:32,127 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-06-05 22:06:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:32,128 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 22:06:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:32,128 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:06:32,128 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 22:06:32,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 22:06:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2021-06-05 22:06:32,131 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 22:06:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-06-05 22:06:32,131 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-06-05 22:06:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:32,132 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-06-05 22:06:32,132 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 22:06:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-06-05 22:06:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:32,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:32,132 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:32,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5032 [2021-06-05 22:06:32,332 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash -624132971, now seen corresponding path program 583 times [2021-06-05 22:06:32,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:32,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707023802] [2021-06-05 22:06:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:32,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707023802] [2021-06-05 22:06:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707023802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002862274] [2021-06-05 22:06:32,380 INFO 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 22:06:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:32,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:32,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002862274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:32,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:32,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:32,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626329005] [2021-06-05 22:06:32,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:32,563 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 22:06:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:32,784 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2021-06-05 22:06:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:32,784 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 22:06:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:32,785 INFO L225 Difference]: With dead ends: 504 [2021-06-05 22:06:32,785 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 22:06:32,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 22:06:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2021-06-05 22:06:32,788 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 22:06:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2021-06-05 22:06:32,789 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2021-06-05 22:06:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:32,789 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2021-06-05 22:06:32,789 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 22:06:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2021-06-05 22:06:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:32,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:32,789 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:32,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-06-05 22:06:32,989 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1755410399, now seen corresponding path program 584 times [2021-06-05 22:06:32,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:32,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771646658] [2021-06-05 22:06:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:33,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771646658] [2021-06-05 22:06:33,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771646658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34258057] [2021-06-05 22:06:33,040 INFO L93 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 22:06:33,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:33,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:33,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:33,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:33,231 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 22:06:33,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34258057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:33,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:33,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019406826] [2021-06-05 22:06:33,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:33,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:33,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:33,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:33,232 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 22:06:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:33,533 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2021-06-05 22:06:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:33,533 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 22:06:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:33,534 INFO L225 Difference]: With dead ends: 504 [2021-06-05 22:06:33,534 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 22:06:33,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 22:06:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2021-06-05 22:06:33,537 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 22:06:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-06-05 22:06:33,538 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2021-06-05 22:06:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:33,538 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-06-05 22:06:33,538 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 22:06:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-06-05 22:06:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:33,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:33,538 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:33,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:33,739 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:33,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1499321099, now seen corresponding path program 585 times [2021-06-05 22:06:33,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:33,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311427550] [2021-06-05 22:06:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:33,788 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 22:06:33,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:33,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311427550] [2021-06-05 22:06:33,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311427550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429840974] [2021-06-05 22:06:33,788 INFO L93 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 22:06:33,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:33,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:33,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429840974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:33,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:06:33,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242325908] [2021-06-05 22:06:33,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:06:33,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:33,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:06:33,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:06:33,972 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 22:06:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:34,203 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2021-06-05 22:06:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:34,203 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 22:06:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:34,204 INFO L225 Difference]: With dead ends: 493 [2021-06-05 22:06:34,204 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 22:06:34,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 22:06:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2021-06-05 22:06:34,207 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 22:06:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2021-06-05 22:06:34,207 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2021-06-05 22:06:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:34,207 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2021-06-05 22:06:34,207 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 22:06:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2021-06-05 22:06:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:34,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:34,208 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:34,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5044,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:34,408 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash 260731841, now seen corresponding path program 586 times [2021-06-05 22:06:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:34,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444871241] [2021-06-05 22:06:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:34,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444871241] [2021-06-05 22:06:34,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444871241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720520224] [2021-06-05 22:06:34,455 INFO L93 rtionOrderModulation]: Changing 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 22:06:34,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:34,626 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 22:06:34,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720520224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:34,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:34,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:06:34,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561353947] [2021-06-05 22:06:34,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:06:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:34,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:06:34,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:06:34,626 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 22:06:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:34,825 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-06-05 22:06:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:34,825 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 22:06:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:34,826 INFO L225 Difference]: With dead ends: 483 [2021-06-05 22:06:34,826 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 22:06:34,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 22:06:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2021-06-05 22:06:34,829 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 22:06:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 22:06:34,829 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 22:06:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:34,829 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 22:06:34,829 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 22:06:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 22:06:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:34,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:34,830 INFO L554 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 22:06:35,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-06-05 22:06:35,030 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1468927926, now seen corresponding path program 587 times [2021-06-05 22:06:35,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:35,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544138191] [2021-06-05 22:06:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:35,136 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 22:06:35,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544138191] [2021-06-05 22:06:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544138191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178785825] [2021-06-05 22:06:35,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:06:35,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:35,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:06:35,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:35,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:06:35,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 22:06:35,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:06:35,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,791 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-06-05 22:06:35,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:35,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:06:35,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,797 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 5 treesize of output 3 [2021-06-05 22:06:35,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:35,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:35,827 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 22:06:35,827 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-06-05 22:06:36,008 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 22:06:36,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178785825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:36,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:36,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:06:36,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027178788] [2021-06-05 22:06:36,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:36,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:36,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:36,009 INFO L87 Difference]: Start difference. First operand 294 states and 866 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 22:06:37,125 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 22:06:37,657 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-06-05 22:06:37,823 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-05 22:06:38,050 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-06-05 22:06:38,268 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-06-05 22:06:38,443 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2021-06-05 22:06:38,631 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-05 22:06:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:38,669 INFO L93 Difference]: Finished difference Result 742 states and 2196 transitions. [2021-06-05 22:06:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:06:38,670 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 22:06:38,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:38,671 INFO L225 Difference]: With dead ends: 742 [2021-06-05 22:06:38,671 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 22:06:38,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2367.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:06:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 22:06:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 354. [2021-06-05 22:06:38,675 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 22:06:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2021-06-05 22:06:38,675 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 21 [2021-06-05 22:06:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:38,675 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2021-06-05 22:06:38,675 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 22:06:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2021-06-05 22:06:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:38,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:38,676 INFO L554 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 22:06:38,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5049,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:38,876 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -194403019, now seen corresponding path program 1 times [2021-06-05 22:06:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:38,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268256092] [2021-06-05 22:06:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:38,962 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 22:06:38,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:38,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268256092] [2021-06-05 22:06:38,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268256092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:38,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845153463] [2021-06-05 22:06:38,963 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 22:06:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:39,152 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 22:06:39,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:39,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:39,157 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 13 treesize of output 9 [2021-06-05 22:06:39,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:39,176 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 22:06:39,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:06:39,176 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 22:06:39,227 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 22:06:39,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845153463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:39,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:39,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652224033] [2021-06-05 22:06:39,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:39,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:39,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:39,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:39,228 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 22:06:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:40,418 INFO L93 Difference]: Finished difference Result 803 states and 2292 transitions. [2021-06-05 22:06:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:06:40,418 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 22:06:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:40,420 INFO L225 Difference]: With dead ends: 803 [2021-06-05 22:06:40,420 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 22:06:40,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 775.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:06:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 22:06:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 417. [2021-06-05 22:06:40,426 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 22:06:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1267 transitions. [2021-06-05 22:06:40,427 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1267 transitions. Word has length 21 [2021-06-05 22:06:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:40,427 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1267 transitions. [2021-06-05 22:06:40,427 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 22:06:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1267 transitions. [2021-06-05 22:06:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:40,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:40,428 INFO L554 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 22:06:40,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5101 [2021-06-05 22:06:40,641 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:40,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1363808043, now seen corresponding path program 2 times [2021-06-05 22:06:40,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:40,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270224580] [2021-06-05 22:06:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:40,739 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 22:06:40,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:40,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270224580] [2021-06-05 22:06:40,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270224580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:40,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126478716] [2021-06-05 22:06:40,740 INFO L93 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 22:06:40,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:40,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:40,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:06:40,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:40,954 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 13 treesize of output 9 [2021-06-05 22:06:40,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:40,958 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 13 treesize of output 9 [2021-06-05 22:06:40,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:40,984 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 22:06:40,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:06:40,985 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 22:06:41,037 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 22:06:41,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126478716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:41,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:41,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:41,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3994673] [2021-06-05 22:06:41,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:41,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:41,038 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 22:06:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:42,358 INFO L93 Difference]: Finished difference Result 1000 states and 2902 transitions. [2021-06-05 22:06:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:06:42,359 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 22:06:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:42,360 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 22:06:42,360 INFO L226 Difference]: Without dead ends: 881 [2021-06-05 22:06:42,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:06:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-05 22:06:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 434. [2021-06-05 22:06:42,365 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 22:06:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1325 transitions. [2021-06-05 22:06:42,366 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1325 transitions. Word has length 21 [2021-06-05 22:06:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:42,366 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1325 transitions. [2021-06-05 22:06:42,366 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 22:06:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1325 transitions. [2021-06-05 22:06:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:42,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:42,366 INFO L554 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 22:06:42,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5106,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:42,567 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2072166261, now seen corresponding path program 3 times [2021-06-05 22:06:42,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:42,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047682022] [2021-06-05 22:06:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:42,650 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 22:06:42,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:42,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047682022] [2021-06-05 22:06:42,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047682022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:42,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48446727] [2021-06-05 22:06:42,650 INFO L93 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 22:06:42,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:42,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:42,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:42,831 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 22:06:42,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,834 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 13 treesize of output 9 [2021-06-05 22:06:42,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:06:42,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:42,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:06:42,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:42,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:42,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:42,887 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 22:06:42,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:06:42,888 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:136, output treesize:40 [2021-06-05 22:06:42,961 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 22:06:42,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48446727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:42,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:42,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:42,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132822534] [2021-06-05 22:06:42,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:42,961 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 22:06:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:44,651 INFO L93 Difference]: Finished difference Result 1044 states and 2937 transitions. [2021-06-05 22:06:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:06:44,651 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 22:06:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:44,652 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 22:06:44,652 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 22:06:44,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1155.3ms TimeCoverageRelationStatistics Valid=308, Invalid=1672, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:06:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 22:06:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 436. [2021-06-05 22:06:44,663 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 22:06:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1347 transitions. [2021-06-05 22:06:44,664 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1347 transitions. Word has length 21 [2021-06-05 22:06:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:44,664 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1347 transitions. [2021-06-05 22:06:44,664 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 22:06:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1347 transitions. [2021-06-05 22:06:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:44,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:44,665 INFO L554 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 22:06:44,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5113 [2021-06-05 22:06:44,865 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 920908903, now seen corresponding path program 4 times [2021-06-05 22:06:44,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:44,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782268601] [2021-06-05 22:06:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:44,961 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 22:06:44,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:44,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782268601] [2021-06-05 22:06:44,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782268601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:44,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476613470] [2021-06-05 22:06:44,961 INFO L93 rtionOrderModulation]: Changing 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 22:06:45,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:45,150 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 22:06:45,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,153 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 13 treesize of output 9 [2021-06-05 22:06:45,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:45,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:45,174 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 22:06:45,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:06:45,174 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 22:06:45,213 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 22:06:45,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476613470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:45,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:45,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:45,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052429805] [2021-06-05 22:06:45,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:45,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:45,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:45,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:45,214 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 22:06:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:46,320 INFO L93 Difference]: Finished difference Result 887 states and 2629 transitions. [2021-06-05 22:06:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:06:46,320 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 22:06:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:46,321 INFO L225 Difference]: With dead ends: 887 [2021-06-05 22:06:46,321 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 22:06:46,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:06:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 22:06:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-06-05 22:06:46,326 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 22:06:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1458 transitions. [2021-06-05 22:06:46,327 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1458 transitions. Word has length 21 [2021-06-05 22:06:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:46,327 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1458 transitions. [2021-06-05 22:06:46,327 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 22:06:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1458 transitions. [2021-06-05 22:06:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:46,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:46,328 INFO L554 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 22:06:46,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5122 [2021-06-05 22:06:46,528 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1629267121, now seen corresponding path program 5 times [2021-06-05 22:06:46,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:46,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466845804] [2021-06-05 22:06:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:46,610 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 22:06:46,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466845804] [2021-06-05 22:06:46,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466845804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477965548] [2021-06-05 22:06:46,611 INFO L93 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 22:06:46,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:46,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:46,790 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 13 treesize of output 9 [2021-06-05 22:06:46,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,793 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 12 treesize of output 8 [2021-06-05 22:06:46,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:46,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:06:46,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,802 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 12 treesize of output 8 [2021-06-05 22:06:46,803 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:46,806 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:46,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:46,854 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 22:06:46,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:06:46,855 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 22:06:46,933 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 22:06:46,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477965548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:46,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:46,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030163308] [2021-06-05 22:06:46,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:46,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:46,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:46,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:46,933 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 22:06:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:48,427 INFO L93 Difference]: Finished difference Result 1114 states and 3228 transitions. [2021-06-05 22:06:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:06:48,427 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 22:06:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:48,429 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 22:06:48,429 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 22:06:48,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:06:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 22:06:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 450. [2021-06-05 22:06:48,436 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 22:06:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1397 transitions. [2021-06-05 22:06:48,436 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1397 transitions. Word has length 21 [2021-06-05 22:06:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:48,436 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1397 transitions. [2021-06-05 22:06:48,437 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 22:06:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1397 transitions. [2021-06-05 22:06:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:48,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:48,437 INFO L554 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 22:06:48,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5127 [2021-06-05 22:06:48,637 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash -477516999, now seen corresponding path program 6 times [2021-06-05 22:06:48,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:48,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371329830] [2021-06-05 22:06:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:48,720 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 22:06:48,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:48,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371329830] [2021-06-05 22:06:48,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371329830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:48,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956763170] [2021-06-05 22:06:48,720 INFO L93 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 22:06:48,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:48,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:48,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:48,929 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 22:06:48,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:48,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:06:48,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:48,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:48,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:06:48,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:48,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:06:48,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:48,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:48,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:48,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:48,986 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 22:06:48,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:06:48,987 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 22:06:49,060 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 22:06:49,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956763170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:49,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:49,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:49,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955723552] [2021-06-05 22:06:49,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:49,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:49,060 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 22:06:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:50,691 INFO L93 Difference]: Finished difference Result 983 states and 2836 transitions. [2021-06-05 22:06:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:06:50,691 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 22:06:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:50,692 INFO L225 Difference]: With dead ends: 983 [2021-06-05 22:06:50,692 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 22:06:50,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1156.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:06:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 22:06:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 456. [2021-06-05 22:06:50,697 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 22:06:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1429 transitions. [2021-06-05 22:06:50,698 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1429 transitions. Word has length 21 [2021-06-05 22:06:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:50,698 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1429 transitions. [2021-06-05 22:06:50,698 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 22:06:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1429 transitions. [2021-06-05 22:06:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:50,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:50,699 INFO L554 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 22:06:50,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5136,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:50,906 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:50,906 INFO L82 PathProgramCache]: Analyzing trace with hash -769034001, now seen corresponding path program 7 times [2021-06-05 22:06:50,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:50,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888901937] [2021-06-05 22:06:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:50,989 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 22:06:50,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:50,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888901937] [2021-06-05 22:06:50,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888901937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:50,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114758220] [2021-06-05 22:06:50,989 INFO 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 22:06:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:51,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:51,186 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 22:06:51,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:51,188 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 22:06:51,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:51,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:51,209 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 22:06:51,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:06:51,210 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 22:06:51,251 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 22:06:51,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114758220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:51,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:51,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:51,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909712812] [2021-06-05 22:06:51,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:51,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:51,252 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 22:06:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:52,388 INFO L93 Difference]: Finished difference Result 962 states and 2828 transitions. [2021-06-05 22:06:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:06:52,388 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 22:06:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:52,390 INFO L225 Difference]: With dead ends: 962 [2021-06-05 22:06:52,390 INFO L226 Difference]: Without dead ends: 843 [2021-06-05 22:06:52,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 707.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:06:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-06-05 22:06:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 477. [2021-06-05 22:06:52,395 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 22:06:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1499 transitions. [2021-06-05 22:06:52,396 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1499 transitions. Word has length 21 [2021-06-05 22:06:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:52,396 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1499 transitions. [2021-06-05 22:06:52,396 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 22:06:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1499 transitions. [2021-06-05 22:06:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:52,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:52,397 INFO L554 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 22:06:52,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5144 [2021-06-05 22:06:52,597 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash -60675783, now seen corresponding path program 8 times [2021-06-05 22:06:52,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:52,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401950444] [2021-06-05 22:06:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:52,680 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 22:06:52,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:52,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401950444] [2021-06-05 22:06:52,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401950444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:52,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888451677] [2021-06-05 22:06:52,680 INFO L93 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 22:06:52,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:52,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:52,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,861 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 12 treesize of output 8 [2021-06-05 22:06:52,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:52,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,867 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 5 treesize of output 3 [2021-06-05 22:06:52,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:06:52,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:52,873 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:52,876 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:52,915 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 22:06:52,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:06:52,916 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 22:06:52,999 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 22:06:53,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888451677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:53,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:53,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:06:53,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822537743] [2021-06-05 22:06:53,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:53,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:53,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:53,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:53,000 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 22:06:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:54,496 INFO L93 Difference]: Finished difference Result 1189 states and 3427 transitions. [2021-06-05 22:06:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:06:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:06:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:54,498 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 22:06:54,498 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 22:06:54,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:06:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 22:06:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 460. [2021-06-05 22:06:54,505 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 22:06:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1438 transitions. [2021-06-05 22:06:54,506 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1438 transitions. Word has length 21 [2021-06-05 22:06:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:54,507 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1438 transitions. [2021-06-05 22:06:54,507 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 22:06:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1438 transitions. [2021-06-05 22:06:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:54,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:54,507 INFO L554 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 22:06:54,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5151,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:54,713 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:54,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2127507393, now seen corresponding path program 9 times [2021-06-05 22:06:54,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:54,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542501546] [2021-06-05 22:06:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:54,795 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 22:06:54,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542501546] [2021-06-05 22:06:54,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542501546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931574802] [2021-06-05 22:06:54,795 INFO L93 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 22:06:54,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:54,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:06:54,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:55,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:06:55,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:55,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:06:55,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:55,047 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-06-05 22:06:55,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:06:55,047 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:20 [2021-06-05 22:06:55,100 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 22:06:55,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931574802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:55,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:55,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:06:55,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054237727] [2021-06-05 22:06:55,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:55,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:55,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:55,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:55,100 INFO L87 Difference]: Start difference. First operand 460 states and 1438 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 22:06:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:56,104 INFO L93 Difference]: Finished difference Result 758 states and 2219 transitions. [2021-06-05 22:06:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:56,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 22:06:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:56,105 INFO L225 Difference]: With dead ends: 758 [2021-06-05 22:06:56,105 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 22:06:56,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 988.3ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 22:06:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 472. [2021-06-05 22:06:56,111 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 22:06:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1467 transitions. [2021-06-05 22:06:56,113 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1467 transitions. Word has length 21 [2021-06-05 22:06:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:56,113 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1467 transitions. [2021-06-05 22:06:56,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 22:06:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1467 transitions. [2021-06-05 22:06:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:56,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:56,114 INFO L554 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 22:06:56,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5161 [2021-06-05 22:06:56,317 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2089287766, now seen corresponding path program 588 times [2021-06-05 22:06:56,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:56,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868311959] [2021-06-05 22:06:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:56,440 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 22:06:56,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:56,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868311959] [2021-06-05 22:06:56,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868311959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:56,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89223234] [2021-06-05 22:06:56,441 INFO L93 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 22:06:56,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:56,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:06:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:56,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:56,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:56,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:06:56,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:06:56,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:56,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:56,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:06:56,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:06:56,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:56,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:56,968 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 8 [2021-06-05 22:06:56,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:56,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,976 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 13 treesize of output 9 [2021-06-05 22:06:56,977 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:06:56,981 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:57,069 INFO L628 ElimStorePlain]: treesize reduction 51, result has 64.6 percent of original size [2021-06-05 22:06:57,070 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 22:06:57,070 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-06-05 22:06:57,154 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 22:06:57,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89223234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:57,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:57,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:57,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766029639] [2021-06-05 22:06:57,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:57,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:57,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:57,155 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 22:06:57,505 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 22:06:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:57,904 INFO L93 Difference]: Finished difference Result 764 states and 2359 transitions. [2021-06-05 22:06:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:57,904 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 22:06:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:57,905 INFO L225 Difference]: With dead ends: 764 [2021-06-05 22:06:57,905 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 22:06:57,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 22:06:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 490. [2021-06-05 22:06:57,910 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 22:06:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1539 transitions. [2021-06-05 22:06:57,911 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1539 transitions. Word has length 21 [2021-06-05 22:06:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:57,911 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1539 transitions. [2021-06-05 22:06:57,911 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 22:06:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1539 transitions. [2021-06-05 22:06:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:06:57,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:57,912 INFO L554 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 22:06:58,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5171 [2021-06-05 22:06:58,112 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1547972576, now seen corresponding path program 589 times [2021-06-05 22:06:58,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:58,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604947492] [2021-06-05 22:06:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:58,309 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 22:06:58,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:58,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604947492] [2021-06-05 22:06:58,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604947492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:58,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265985047] [2021-06-05 22:06:58,310 INFO 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 22:06:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:58,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:06:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:58,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:58,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:58,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:06:58,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:58,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:58,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:58,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:06:58,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:58,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:06:58,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:58,914 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.7 percent of original size [2021-06-05 22:06:58,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:06:58,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:58,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:58,944 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 22:06:58,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-06-05 22:06:59,082 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 22:06:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265985047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:59,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:59,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:06:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919804887] [2021-06-05 22:06:59,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:59,083 INFO L87 Difference]: Start difference. First operand 490 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 22:07:00,063 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-06-05 22:07:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:00,248 INFO L93 Difference]: Finished difference Result 827 states and 2518 transitions. [2021-06-05 22:07:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:00,248 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 22:07:00,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:00,249 INFO L225 Difference]: With dead ends: 827 [2021-06-05 22:07:00,250 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 22:07:00,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1137.1ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:07:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 22:07:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 497. [2021-06-05 22:07:00,255 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 22:07:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1569 transitions. [2021-06-05 22:07:00,255 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1569 transitions. Word has length 21 [2021-06-05 22:07:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:00,256 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1569 transitions. [2021-06-05 22:07:00,256 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 22:07:00,256 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1569 transitions. [2021-06-05 22:07:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:00,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:00,256 INFO L554 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 22:07:00,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-06-05 22:07:00,457 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:00,457 INFO L82 PathProgramCache]: Analyzing trace with hash 270604522, now seen corresponding path program 590 times [2021-06-05 22:07:00,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:00,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186536302] [2021-06-05 22:07:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:00,595 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 22:07:00,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:00,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186536302] [2021-06-05 22:07:00,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186536302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:00,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980606327] [2021-06-05 22:07:00,595 INFO L93 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 22:07:00,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:00,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:07:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:01,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:01,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,129 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 24 treesize of output 1 [2021-06-05 22:07:01,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,135 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 18 treesize of output 1 [2021-06-05 22:07:01,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:01,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,145 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 11 treesize of output 7 [2021-06-05 22:07:01,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,150 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 17 treesize of output 11 [2021-06-05 22:07:01,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:01,156 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 22:07:01,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:01,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:01,165 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:01,334 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 22:07:01,334 INFO L628 ElimStorePlain]: treesize reduction 5, result has 97.4 percent of original size [2021-06-05 22:07:01,336 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 22:07:01,336 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-06-05 22:07:01,568 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 22:07:01,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980606327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:01,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:01,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429211660] [2021-06-05 22:07:01,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:01,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:01,569 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 22:07:02,155 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 22:07:02,366 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 22:07:02,571 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 22:07:02,772 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-06-05 22:07:02,968 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 22:07:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:03,042 INFO L93 Difference]: Finished difference Result 823 states and 2486 transitions. [2021-06-05 22:07:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:03,042 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 22:07:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:03,043 INFO L225 Difference]: With dead ends: 823 [2021-06-05 22:07:03,043 INFO L226 Difference]: Without dead ends: 729 [2021-06-05 22:07:03,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1490.7ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-05 22:07:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 482. [2021-06-05 22:07:03,048 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 22:07:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1504 transitions. [2021-06-05 22:07:03,049 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1504 transitions. Word has length 21 [2021-06-05 22:07:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:03,049 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1504 transitions. [2021-06-05 22:07:03,049 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 22:07:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1504 transitions. [2021-06-05 22:07:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:03,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:03,049 INFO L554 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 22:07:03,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5268,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:03,250 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:03,250 INFO L82 PathProgramCache]: Analyzing trace with hash -72354998, now seen corresponding path program 591 times [2021-06-05 22:07:03,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:03,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329088987] [2021-06-05 22:07:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:03,413 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 22:07:03,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:03,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329088987] [2021-06-05 22:07:03,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329088987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:03,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556246991] [2021-06-05 22:07:03,413 INFO L93 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 22:07:03,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:03,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:03,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:07:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:03,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:03,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 22:07:03,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:07:03,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:03,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,871 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 13 treesize of output 9 [2021-06-05 22:07:03,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:03,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:03,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 22:07:03,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:03,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:03,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:07:03,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:03,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:03,974 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.2 percent of original size [2021-06-05 22:07:03,976 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 22:07:03,976 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-06-05 22:07:04,057 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 22:07:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556246991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:04,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:04,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:07:04,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204266861] [2021-06-05 22:07:04,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:04,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:04,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:04,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:04,057 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 22:07:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:04,659 INFO L93 Difference]: Finished difference Result 767 states and 2356 transitions. [2021-06-05 22:07:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:04,659 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 22:07:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:04,660 INFO L225 Difference]: With dead ends: 767 [2021-06-05 22:07:04,660 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 22:07:04,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 594.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 22:07:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 498. [2021-06-05 22:07:04,665 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 22:07:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1569 transitions. [2021-06-05 22:07:04,666 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1569 transitions. Word has length 21 [2021-06-05 22:07:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:04,666 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1569 transitions. [2021-06-05 22:07:04,666 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 22:07:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1569 transitions. [2021-06-05 22:07:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:04,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:04,666 INFO L554 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 22:07:04,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5307 [2021-06-05 22:07:04,867 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:04,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:04,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1746222100, now seen corresponding path program 592 times [2021-06-05 22:07:04,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:04,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118763099] [2021-06-05 22:07:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:05,006 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 22:07:05,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118763099] [2021-06-05 22:07:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118763099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075242901] [2021-06-05 22:07:05,007 INFO L93 rtionOrderModulation]: Changing 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 22:07:05,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:05,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:05,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:07:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:05,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:05,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,491 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 12 treesize of output 8 [2021-06-05 22:07:05,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,496 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 22:07:05,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,501 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 18 treesize of output 1 [2021-06-05 22:07:05,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:05,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,511 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 25 treesize of output 13 [2021-06-05 22:07:05,512 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:05,518 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,524 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 22:07:05,524 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:05,528 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 11 treesize of output 7 [2021-06-05 22:07:05,529 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:05,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:05,588 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 22:07:05,588 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 22:07:05,799 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 22:07:05,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075242901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:05,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:05,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:07:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705251848] [2021-06-05 22:07:05,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:05,799 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 22:07:06,718 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 22:07:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:06,919 INFO L93 Difference]: Finished difference Result 811 states and 2461 transitions. [2021-06-05 22:07:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:06,919 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 22:07:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:06,920 INFO L225 Difference]: With dead ends: 811 [2021-06-05 22:07:06,920 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 22:07:06,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1093.0ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 22:07:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 491. [2021-06-05 22:07:06,925 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 22:07:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1539 transitions. [2021-06-05 22:07:06,926 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1539 transitions. Word has length 21 [2021-06-05 22:07:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:06,926 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1539 transitions. [2021-06-05 22:07:06,926 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 22:07:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1539 transitions. [2021-06-05 22:07:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:06,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:06,927 INFO L554 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 22:07:07,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5349,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:07,127 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash 685444010, now seen corresponding path program 593 times [2021-06-05 22:07:07,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:07,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52701927] [2021-06-05 22:07:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:07,270 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 22:07:07,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:07,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52701927] [2021-06-05 22:07:07,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52701927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:07,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602423595] [2021-06-05 22:07:07,270 INFO L93 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 22:07:07,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:07,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:07:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:07,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:07,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:07,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:07,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:07,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,699 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 18 treesize of output 1 [2021-06-05 22:07:07,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,704 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 17 treesize of output 8 [2021-06-05 22:07:07,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:07,857 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:07:07,858 INFO L628 ElimStorePlain]: treesize reduction 218, result has 44.2 percent of original size [2021-06-05 22:07:07,861 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 5 treesize of output 3 [2021-06-05 22:07:07,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:07,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:07,866 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:07,988 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 22:07:07,988 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-06-05 22:07:07,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:07,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:07,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:07,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:08,007 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:08,110 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 22:07:08,111 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 22:07:08,113 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 22:07:08,113 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:530, output treesize:89 [2021-06-05 22:07:08,326 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 22:07:08,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602423595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:08,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:07:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434427357] [2021-06-05 22:07:08,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:08,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:08,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:08,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:08,327 INFO L87 Difference]: Start difference. First operand 491 states and 1539 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 22:07:09,179 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 22:07:09,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:09,456 INFO L93 Difference]: Finished difference Result 945 states and 2797 transitions. [2021-06-05 22:07:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:09,456 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 22:07:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:09,457 INFO L225 Difference]: With dead ends: 945 [2021-06-05 22:07:09,457 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 22:07:09,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1078.8ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 22:07:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 508. [2021-06-05 22:07:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.175542406311637) internal successors, (1610), 507 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1610 transitions. [2021-06-05 22:07:09,464 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1610 transitions. Word has length 21 [2021-06-05 22:07:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:09,464 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1610 transitions. [2021-06-05 22:07:09,464 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 22:07:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1610 transitions. [2021-06-05 22:07:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:09,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:09,464 INFO L554 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 22:07:09,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5423,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:09,665 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 628552498, now seen corresponding path program 594 times [2021-06-05 22:07:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:09,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343780963] [2021-06-05 22:07:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:09,851 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 22:07:09,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343780963] [2021-06-05 22:07:09,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343780963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673531174] [2021-06-05 22:07:09,852 INFO L93 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 22:07:09,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:09,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:07:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:07:10,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:10,132 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 12 treesize of output 8 [2021-06-05 22:07:10,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:10,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:07:10,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:10,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:10,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:10,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:10,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:10,163 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 22:07:10,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:07:10,164 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-06-05 22:07:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:10,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673531174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:10,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:10,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:07:10,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811300360] [2021-06-05 22:07:10,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:07:10,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:07:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:10,228 INFO L87 Difference]: Start difference. First operand 508 states and 1610 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 22:07:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:11,131 INFO L93 Difference]: Finished difference Result 989 states and 3003 transitions. [2021-06-05 22:07:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:07:11,132 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 22:07:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:11,133 INFO L225 Difference]: With dead ends: 989 [2021-06-05 22:07:11,133 INFO L226 Difference]: Without dead ends: 898 [2021-06-05 22:07:11,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 799.3ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:07:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-05 22:07:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 514. [2021-06-05 22:07:11,139 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 22:07:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1633 transitions. [2021-06-05 22:07:11,139 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1633 transitions. Word has length 21 [2021-06-05 22:07:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:11,139 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1633 transitions. [2021-06-05 22:07:11,140 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 22:07:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1633 transitions. [2021-06-05 22:07:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:11,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:11,140 INFO L554 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 22:07:11,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5481 [2021-06-05 22:07:11,341 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash -44589279, now seen corresponding path program 10 times [2021-06-05 22:07:11,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:11,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889944708] [2021-06-05 22:07:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:11,442 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 22:07:11,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889944708] [2021-06-05 22:07:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889944708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186127605] [2021-06-05 22:07:11,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 22:07:11,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:11,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:11,626 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 22:07:11,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:11,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:07:11,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:11,632 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 12 treesize of output 8 [2021-06-05 22:07:11,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:11,635 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 13 treesize of output 9 [2021-06-05 22:07:11,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:11,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:11,638 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:11,675 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 22:07:11,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:11,676 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 22:07:11,753 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 22:07:11,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186127605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:11,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:11,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:11,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111481795] [2021-06-05 22:07:11,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:11,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:11,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:11,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:11,753 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 22:07:13,288 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:07:13,648 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 22:07:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:13,798 INFO L93 Difference]: Finished difference Result 1303 states and 3840 transitions. [2021-06-05 22:07:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:07:13,799 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 22:07:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:13,800 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 22:07:13,800 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 22:07:13,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1600.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:07:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 22:07:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 554. [2021-06-05 22:07:13,807 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 22:07:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-06-05 22:07:13,807 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-06-05 22:07:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:13,807 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-06-05 22:07:13,808 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 22:07:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-06-05 22:07:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:13,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:13,808 INFO L554 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 22:07:14,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5493 [2021-06-05 22:07:14,009 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash -313335707, now seen corresponding path program 11 times [2021-06-05 22:07:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:14,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215754196] [2021-06-05 22:07:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:14,123 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 22:07:14,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215754196] [2021-06-05 22:07:14,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215754196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119762516] [2021-06-05 22:07:14,123 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 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 22:07:14,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:14,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:14,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:14,357 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 12 treesize of output 8 [2021-06-05 22:07:14,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,361 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 5 treesize of output 3 [2021-06-05 22:07:14,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:14,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:14,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:14,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:14,411 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 22:07:14,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:14,412 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 22:07:14,503 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 22:07:14,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119762516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:14,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:14,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410790402] [2021-06-05 22:07:14,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:14,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:14,504 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 22:07:15,757 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 22:07:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:16,118 INFO L93 Difference]: Finished difference Result 1175 states and 3509 transitions. [2021-06-05 22:07:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:07:16,119 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 22:07:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:16,120 INFO L225 Difference]: With dead ends: 1175 [2021-06-05 22:07:16,120 INFO L226 Difference]: Without dead ends: 1007 [2021-06-05 22:07:16,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1159.1ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:07:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-05 22:07:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 554. [2021-06-05 22:07:16,126 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 22:07:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-06-05 22:07:16,127 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-06-05 22:07:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:16,127 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-06-05 22:07:16,127 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 22:07:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-06-05 22:07:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:16,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:16,128 INFO L554 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 22:07:16,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5502,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:16,328 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1549516187, now seen corresponding path program 12 times [2021-06-05 22:07:16,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:16,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202740099] [2021-06-05 22:07:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:16,428 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 22:07:16,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:16,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202740099] [2021-06-05 22:07:16,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202740099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387324455] [2021-06-05 22:07:16,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:07:16,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:16,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:16,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:16,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,666 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 5 treesize of output 3 [2021-06-05 22:07:16,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:16,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:16,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:16,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:16,719 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 22:07:16,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:16,720 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 22:07:16,791 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 22:07:16,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387324455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:16,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:16,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158149728] [2021-06-05 22:07:16,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:16,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:16,791 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 22:07:18,224 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 22:07:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:18,675 INFO L93 Difference]: Finished difference Result 1201 states and 3525 transitions. [2021-06-05 22:07:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:07:18,676 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 22:07:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:18,677 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 22:07:18,677 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 22:07:18,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1471.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:07:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 22:07:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 561. [2021-06-05 22:07:18,683 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 22:07:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1801 transitions. [2021-06-05 22:07:18,684 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1801 transitions. Word has length 21 [2021-06-05 22:07:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:18,684 INFO L482 AbstractCegarLoop]: Abstraction has 561 states and 1801 transitions. [2021-06-05 22:07:18,684 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 22:07:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1801 transitions. [2021-06-05 22:07:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:18,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:18,685 INFO L554 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 22:07:18,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5515 [2021-06-05 22:07:18,885 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1267648421, now seen corresponding path program 13 times [2021-06-05 22:07:18,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:18,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438866978] [2021-06-05 22:07:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:18,992 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 22:07:18,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:18,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438866978] [2021-06-05 22:07:18,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438866978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133790627] [2021-06-05 22:07:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 22:07:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:19,246 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 22:07:19,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133790627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:19,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:19,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:19,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215442398] [2021-06-05 22:07:19,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:19,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:19,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:19,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:19,247 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 22:07:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:20,878 INFO L93 Difference]: Finished difference Result 1086 states and 3218 transitions. [2021-06-05 22:07:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:07:20,878 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 22:07:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:20,879 INFO L225 Difference]: With dead ends: 1086 [2021-06-05 22:07:20,880 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 22:07:20,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1205.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:07:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 22:07:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 564. [2021-06-05 22:07:20,885 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 22:07:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1803 transitions. [2021-06-05 22:07:20,886 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1803 transitions. Word has length 21 [2021-06-05 22:07:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:20,886 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1803 transitions. [2021-06-05 22:07:20,886 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 22:07:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1803 transitions. [2021-06-05 22:07:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:20,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:20,887 INFO L554 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 22:07:21,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:21,087 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2088867469, now seen corresponding path program 14 times [2021-06-05 22:07:21,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:21,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455333498] [2021-06-05 22:07:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:21,173 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 22:07:21,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:21,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455333498] [2021-06-05 22:07:21,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455333498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:21,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739371232] [2021-06-05 22:07:21,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:07:21,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:21,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:21,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:21,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,373 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 22:07:21,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:21,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:21,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:21,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:21,420 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 22:07:21,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:21,421 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 22:07:21,494 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 22:07:21,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739371232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:21,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:21,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:21,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690945134] [2021-06-05 22:07:21,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:21,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:21,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:21,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:21,495 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 22:07:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:22,862 INFO L93 Difference]: Finished difference Result 1381 states and 4019 transitions. [2021-06-05 22:07:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:07:22,863 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 22:07:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:22,864 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 22:07:22,864 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 22:07:22,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 878.2ms TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:07:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 22:07:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 572. [2021-06-05 22:07:22,871 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 22:07:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1838 transitions. [2021-06-05 22:07:22,872 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1838 transitions. Word has length 21 [2021-06-05 22:07:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:22,872 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1838 transitions. [2021-06-05 22:07:22,872 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 22:07:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1838 transitions. [2021-06-05 22:07:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:22,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:22,873 INFO L554 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 22:07:23,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5528,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:23,073 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:23,074 INFO L82 PathProgramCache]: Analyzing trace with hash 877402407, now seen corresponding path program 15 times [2021-06-05 22:07:23,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:23,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839547498] [2021-06-05 22:07:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:23,160 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 22:07:23,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:23,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839547498] [2021-06-05 22:07:23,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839547498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:23,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394406183] [2021-06-05 22:07:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 22:07:23,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:23,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:23,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:07:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:07:23,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:23,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:23,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:23,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:23,446 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-06-05 22:07:23,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:07:23,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:84, output treesize:41 [2021-06-05 22:07:23,517 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 22:07:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394406183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:23,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:23,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:07:23,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436823260] [2021-06-05 22:07:23,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:23,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:23,518 INFO L87 Difference]: Start difference. First operand 572 states and 1838 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 22:07:24,428 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 22:07:24,813 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 22:07:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:25,229 INFO L93 Difference]: Finished difference Result 1101 states and 3236 transitions. [2021-06-05 22:07:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:07:25,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 22:07:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:25,230 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 22:07:25,230 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 22:07:25,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:07:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 22:07:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 575. [2021-06-05 22:07:25,239 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 22:07:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1851 transitions. [2021-06-05 22:07:25,241 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1851 transitions. Word has length 21 [2021-06-05 22:07:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:25,241 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1851 transitions. [2021-06-05 22:07:25,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 22:07:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1851 transitions. [2021-06-05 22:07:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:25,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:25,242 INFO L554 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 22:07:25,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5535 [2021-06-05 22:07:25,457 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1635274031, now seen corresponding path program 16 times [2021-06-05 22:07:25,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:25,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192868492] [2021-06-05 22:07:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:25,558 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 22:07:25,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:25,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192868492] [2021-06-05 22:07:25,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192868492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286666904] [2021-06-05 22:07:25,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 22:07:25,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:25,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:25,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:25,735 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 22:07:25,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:25,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:25,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:07:25,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,747 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 12 treesize of output 8 [2021-06-05 22:07:25,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,749 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 13 treesize of output 9 [2021-06-05 22:07:25,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:25,753 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:25,792 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 22:07:25,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:25,792 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 22:07:25,875 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 22:07:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286666904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:25,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:25,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081056138] [2021-06-05 22:07:25,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:25,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:25,876 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 22:07:27,146 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 22:07:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:27,726 INFO L93 Difference]: Finished difference Result 1407 states and 4127 transitions. [2021-06-05 22:07:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:07:27,726 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 22:07:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:27,728 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 22:07:27,728 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 22:07:27,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1380.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:07:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 22:07:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 569. [2021-06-05 22:07:27,735 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 22:07:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1840 transitions. [2021-06-05 22:07:27,736 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1840 transitions. Word has length 21 [2021-06-05 22:07:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:27,736 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1840 transitions. [2021-06-05 22:07:27,736 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 22:07:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1840 transitions. [2021-06-05 22:07:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:27,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:27,737 INFO L554 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 22:07:27,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5547,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:27,937 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1031925539, now seen corresponding path program 17 times [2021-06-05 22:07:27,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:27,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005966778] [2021-06-05 22:07:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:28,034 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 22:07:28,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:28,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005966778] [2021-06-05 22:07:28,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005966778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:28,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472085305] [2021-06-05 22:07:28,034 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 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 22:07:28,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:28,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:28,238 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 22:07:28,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:28,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:28,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:28,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:28,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:28,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:07:28,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:28,250 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 12 treesize of output 8 [2021-06-05 22:07:28,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:28,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:28,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:28,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:28,256 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:28,296 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 22:07:28,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:28,297 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 22:07:28,368 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 22:07:28,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472085305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:28,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:28,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:28,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283846495] [2021-06-05 22:07:28,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:28,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:28,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:28,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:28,369 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 22:07:29,745 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 22:07:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:30,362 INFO L93 Difference]: Finished difference Result 1420 states and 4101 transitions. [2021-06-05 22:07:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:07:30,362 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 22:07:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:30,364 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 22:07:30,364 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 22:07:30,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1503.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:07:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 22:07:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 569. [2021-06-05 22:07:30,371 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 22:07:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1833 transitions. [2021-06-05 22:07:30,372 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1833 transitions. Word has length 21 [2021-06-05 22:07:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:30,372 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1833 transitions. [2021-06-05 22:07:30,372 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 22:07:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1833 transitions. [2021-06-05 22:07:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:30,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:30,372 INFO L554 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 22:07:30,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5556,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:30,573 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1785239069, now seen corresponding path program 18 times [2021-06-05 22:07:30,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:30,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79760401] [2021-06-05 22:07:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:30,676 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 22:07:30,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79760401] [2021-06-05 22:07:30,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79760401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:30,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532432860] [2021-06-05 22:07:30,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 22:07:30,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:30,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:30,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:30,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:30,922 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 22:07:30,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532432860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:30,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:30,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:30,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334860594] [2021-06-05 22:07:30,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:30,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:30,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:30,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:30,923 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 22:07:32,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:32,820 INFO L93 Difference]: Finished difference Result 1407 states and 4062 transitions. [2021-06-05 22:07:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:07:32,820 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 22:07:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:32,821 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 22:07:32,821 INFO L226 Difference]: Without dead ends: 1151 [2021-06-05 22:07:32,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1388.5ms TimeCoverageRelationStatistics Valid=350, Invalid=2406, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:07:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-06-05 22:07:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 547. [2021-06-05 22:07:32,828 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 22:07:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1744 transitions. [2021-06-05 22:07:32,829 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1744 transitions. Word has length 21 [2021-06-05 22:07:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:32,829 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1744 transitions. [2021-06-05 22:07:32,829 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 22:07:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1744 transitions. [2021-06-05 22:07:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:32,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:32,830 INFO L554 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 22:07:33,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5565,615 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:33,030 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:33,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1697213177, now seen corresponding path program 19 times [2021-06-05 22:07:33,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:33,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907486493] [2021-06-05 22:07:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:33,120 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 22:07:33,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:33,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907486493] [2021-06-05 22:07:33,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907486493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:33,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113115911] [2021-06-05 22:07:33,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 22:07:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:33,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:33,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:33,340 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 5 treesize of output 3 [2021-06-05 22:07:33,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:33,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:33,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:33,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:33,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:33,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:33,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:33,388 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 22:07:33,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:33,389 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 22:07:33,468 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 22:07:33,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113115911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:33,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:33,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:33,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216797566] [2021-06-05 22:07:33,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:33,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:33,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:33,469 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 22:07:34,628 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 22:07:35,078 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 22:07:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:36,572 INFO L93 Difference]: Finished difference Result 1838 states and 5319 transitions. [2021-06-05 22:07:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:07:36,573 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 22:07:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:36,574 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 22:07:36,575 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 22:07:36,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2506.4ms TimeCoverageRelationStatistics Valid=485, Invalid=2595, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:07:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 22:07:36,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 589. [2021-06-05 22:07:36,583 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 22:07:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-06-05 22:07:36,584 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-06-05 22:07:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:36,584 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-06-05 22:07:36,584 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 22:07:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-06-05 22:07:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:36,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:36,585 INFO L554 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 22:07:36,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5569,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:36,785 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash -19587725, now seen corresponding path program 20 times [2021-06-05 22:07:36,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:36,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7005925] [2021-06-05 22:07:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:36,887 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 22:07:36,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:36,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7005925] [2021-06-05 22:07:36,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7005925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:36,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972382746] [2021-06-05 22:07:36,887 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 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 22:07:37,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:37,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:37,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:37,104 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 13 treesize of output 9 [2021-06-05 22:07:37,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:37,109 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 12 treesize of output 8 [2021-06-05 22:07:37,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:37,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:37,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:37,115 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 5 treesize of output 3 [2021-06-05 22:07:37,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:37,118 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 22:07:37,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:37,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:37,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:37,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:37,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:37,164 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 22:07:37,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:07:37,165 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 22:07:37,250 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 22:07:37,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972382746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:37,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:37,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:37,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28512327] [2021-06-05 22:07:37,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:37,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:37,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:37,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:37,250 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 22:07:37,871 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 22:07:38,364 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 22:07:38,583 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 22:07:38,949 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 22:07:39,137 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:07:39,260 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 22:07:39,710 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-05 22:07:39,873 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 22:07:40,113 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 22:07:40,293 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-05 22:07:40,913 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 22:07:41,503 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 22:07:41,703 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 22:07:41,859 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 22:07:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:41,872 INFO L93 Difference]: Finished difference Result 1916 states and 5539 transitions. [2021-06-05 22:07:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:07:41,872 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 22:07:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:41,874 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 22:07:41,874 INFO L226 Difference]: Without dead ends: 1653 [2021-06-05 22:07:41,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 4075.2ms TimeCoverageRelationStatistics Valid=680, Invalid=3352, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:07:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-06-05 22:07:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 583. [2021-06-05 22:07:41,883 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 22:07:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1885 transitions. [2021-06-05 22:07:41,884 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1885 transitions. Word has length 21 [2021-06-05 22:07:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:41,884 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1885 transitions. [2021-06-05 22:07:41,884 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 22:07:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1885 transitions. [2021-06-05 22:07:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:41,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:41,884 INFO L554 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 22:07:42,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5580 [2021-06-05 22:07:42,085 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash -936424141, now seen corresponding path program 21 times [2021-06-05 22:07:42,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:42,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319904477] [2021-06-05 22:07:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:42,194 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 22:07:42,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:42,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319904477] [2021-06-05 22:07:42,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319904477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:42,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040857941] [2021-06-05 22:07:42,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 22:07:42,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:42,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:42,480 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 22:07:42,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040857941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:42,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:42,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:07:42,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303164480] [2021-06-05 22:07:42,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:42,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:42,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:42,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:42,481 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 22:07:43,043 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 22:07:43,490 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 22:07:44,977 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 22:07:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:45,101 INFO L93 Difference]: Finished difference Result 1743 states and 5017 transitions. [2021-06-05 22:07:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:07:45,101 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 22:07:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:45,103 INFO L225 Difference]: With dead ends: 1743 [2021-06-05 22:07:45,103 INFO L226 Difference]: Without dead ends: 1466 [2021-06-05 22:07:45,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2143.9ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:07:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-06-05 22:07:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 573. [2021-06-05 22:07:45,111 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 22:07:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1843 transitions. [2021-06-05 22:07:45,112 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1843 transitions. Word has length 21 [2021-06-05 22:07:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:45,112 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1843 transitions. [2021-06-05 22:07:45,112 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 22:07:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1843 transitions. [2021-06-05 22:07:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:45,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:45,113 INFO L554 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 22:07:45,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5593,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:45,329 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash -792723440, now seen corresponding path program 595 times [2021-06-05 22:07:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:45,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968522333] [2021-06-05 22:07:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:45,448 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 22:07:45,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968522333] [2021-06-05 22:07:45,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968522333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233649444] [2021-06-05 22:07:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 22:07:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:07:45,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:45,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:45,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,936 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 12 treesize of output 1 [2021-06-05 22:07:45,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 22:07:45,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:45,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:45,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 22:07:45,951 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:45,954 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 22:07:45,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:46,047 INFO L628 ElimStorePlain]: treesize reduction 29, result has 75.0 percent of original size [2021-06-05 22:07:46,050 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 22:07:46,050 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-06-05 22:07:46,145 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 22:07:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233649444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:46,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:46,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588464374] [2021-06-05 22:07:46,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:46,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:46,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:46,146 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 22:07:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:46,590 INFO L93 Difference]: Finished difference Result 789 states and 2495 transitions. [2021-06-05 22:07:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:46,591 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 22:07:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:46,592 INFO L225 Difference]: With dead ends: 789 [2021-06-05 22:07:46,592 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 22:07:46,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 22:07:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 612. [2021-06-05 22:07:46,597 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 22:07:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1982 transitions. [2021-06-05 22:07:46,598 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1982 transitions. Word has length 21 [2021-06-05 22:07:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:46,598 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1982 transitions. [2021-06-05 22:07:46,598 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 22:07:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1982 transitions. [2021-06-05 22:07:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:46,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:46,599 INFO L554 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 22:07:46,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5599 [2021-06-05 22:07:46,799 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:46,800 INFO L82 PathProgramCache]: Analyzing trace with hash -251408250, now seen corresponding path program 596 times [2021-06-05 22:07:46,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:46,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008037915] [2021-06-05 22:07:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:46,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008037915] [2021-06-05 22:07:46,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008037915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397887939] [2021-06-05 22:07:46,924 INFO L93 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 22:07:47,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:47,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:47,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:07:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:47,430 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 12 treesize of output 8 [2021-06-05 22:07:47,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:07:47,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:47,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 22:07:47,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:07:47,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:47,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:47,448 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 8 [2021-06-05 22:07:47,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:47,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:47,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:47,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:47,457 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,459 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 13 treesize of output 9 [2021-06-05 22:07:47,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:47,539 INFO L628 ElimStorePlain]: treesize reduction 53, result has 63.7 percent of original size [2021-06-05 22:07:47,541 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 22:07:47,541 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-06-05 22:07:47,624 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 22:07:47,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397887939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:47,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:47,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:47,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484397603] [2021-06-05 22:07:47,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:47,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:47,625 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 22:07:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:48,389 INFO L93 Difference]: Finished difference Result 836 states and 2636 transitions. [2021-06-05 22:07:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:48,390 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 22:07:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:48,391 INFO L225 Difference]: With dead ends: 836 [2021-06-05 22:07:48,391 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 22:07:48,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 722.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 22:07:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 619. [2021-06-05 22:07:48,397 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 22:07:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2011 transitions. [2021-06-05 22:07:48,398 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2011 transitions. Word has length 21 [2021-06-05 22:07:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:48,398 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2011 transitions. [2021-06-05 22:07:48,398 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 22:07:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2011 transitions. [2021-06-05 22:07:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:48,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:48,399 INFO L554 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 22:07:48,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5643,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:48,599 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1567168848, now seen corresponding path program 597 times [2021-06-05 22:07:48,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:48,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22899683] [2021-06-05 22:07:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:48,719 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 22:07:48,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22899683] [2021-06-05 22:07:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22899683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556422531] [2021-06-05 22:07:48,719 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 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 22:07:48,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:48,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:07:48,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:49,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:49,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:49,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:49,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:07:49,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:49,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:49,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:07:49,386 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:49,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:49,395 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:49,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:49,406 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:49,409 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 1 [2021-06-05 22:07:49,410 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:49,542 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 22:07:49,542 INFO L628 ElimStorePlain]: treesize reduction 117, result has 53.9 percent of original size [2021-06-05 22:07:49,544 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 22:07:49,544 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:604, output treesize:73 [2021-06-05 22:07:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:49,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556422531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:49,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:49,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:07:49,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475854336] [2021-06-05 22:07:49,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:07:49,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:07:49,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:49,765 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 22:07:50,792 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 22:07:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:50,998 INFO L93 Difference]: Finished difference Result 840 states and 2630 transitions. [2021-06-05 22:07:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:50,999 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 22:07:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:51,000 INFO L225 Difference]: With dead ends: 840 [2021-06-05 22:07:51,000 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 22:07:51,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1221.5ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:07:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 22:07:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 605. [2021-06-05 22:07:51,005 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 22:07:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1953 transitions. [2021-06-05 22:07:51,006 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1953 transitions. Word has length 21 [2021-06-05 22:07:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:51,006 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1953 transitions. [2021-06-05 22:07:51,006 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 22:07:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1953 transitions. [2021-06-05 22:07:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:51,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:51,007 INFO L554 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 22:07:51,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5685 [2021-06-05 22:07:51,207 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1224209328, now seen corresponding path program 598 times [2021-06-05 22:07:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:51,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016631604] [2021-06-05 22:07:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:51,386 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 22:07:51,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:51,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016631604] [2021-06-05 22:07:51,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016631604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:51,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88259925] [2021-06-05 22:07:51,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:07:51,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:51,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:07:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:51,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:51,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:51,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:51,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:51,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:07:51,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:51,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:51,885 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:51,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:51,922 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 22:07:51,922 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-06-05 22:07:52,055 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 22:07:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88259925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:07:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100702103] [2021-06-05 22:07:52,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:52,056 INFO L87 Difference]: Start difference. First operand 605 states and 1953 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 22:07:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:53,004 INFO L93 Difference]: Finished difference Result 843 states and 2648 transitions. [2021-06-05 22:07:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:07:53,005 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 22:07:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:53,006 INFO L225 Difference]: With dead ends: 843 [2021-06-05 22:07:53,006 INFO L226 Difference]: Without dead ends: 774 [2021-06-05 22:07:53,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 952.7ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-05 22:07:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 626. [2021-06-05 22:07:53,012 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 22:07:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2035 transitions. [2021-06-05 22:07:53,013 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2035 transitions. Word has length 21 [2021-06-05 22:07:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:53,013 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 2035 transitions. [2021-06-05 22:07:53,013 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 22:07:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2035 transitions. [2021-06-05 22:07:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:53,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:53,013 INFO L554 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 22:07:53,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5733,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:53,214 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:53,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1252180870, now seen corresponding path program 599 times [2021-06-05 22:07:53,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:53,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508788860] [2021-06-05 22:07:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:53,354 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 22:07:53,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508788860] [2021-06-05 22:07:53,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508788860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774959542] [2021-06-05 22:07:53,355 INFO L93 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 22:07:53,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:53,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:07:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:53,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:53,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:07:53,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,828 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 19 treesize of output 13 [2021-06-05 22:07:53,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,833 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 12 treesize of output 8 [2021-06-05 22:07:53,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,838 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 24 treesize of output 12 [2021-06-05 22:07:53,839 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:53,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:53,848 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:53,855 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:53,859 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 17 treesize of output 11 [2021-06-05 22:07:53,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:54,041 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 22:07:54,042 INFO L628 ElimStorePlain]: treesize reduction 6, result has 97.3 percent of original size [2021-06-05 22:07:54,044 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 22:07:54,044 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:118 [2021-06-05 22:07:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:54,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774959542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:54,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:54,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:07:54,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165088415] [2021-06-05 22:07:54,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:54,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:54,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:54,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:54,308 INFO L87 Difference]: Start difference. First operand 626 states and 2035 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 22:07:54,685 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 22:07:54,835 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-06-05 22:07:54,961 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 22:07:55,104 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 22:07:55,241 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 22:07:55,395 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 22:07:55,547 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-05 22:07:55,710 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 22:07:55,844 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 22:07:55,968 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 22:07:56,094 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 22:07:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:56,114 INFO L93 Difference]: Finished difference Result 922 states and 2815 transitions. [2021-06-05 22:07:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:07:56,115 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 22:07:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:56,116 INFO L225 Difference]: With dead ends: 922 [2021-06-05 22:07:56,116 INFO L226 Difference]: Without dead ends: 784 [2021-06-05 22:07:56,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1813.9ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:07:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-06-05 22:07:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 619. [2021-06-05 22:07:56,121 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 22:07:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2006 transitions. [2021-06-05 22:07:56,122 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2006 transitions. Word has length 21 [2021-06-05 22:07:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:56,122 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2006 transitions. [2021-06-05 22:07:56,122 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 22:07:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2006 transitions. [2021-06-05 22:07:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:56,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:56,123 INFO L554 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 22:07:56,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5785,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:56,323 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:56,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1982008336, now seen corresponding path program 600 times [2021-06-05 22:07:56,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:56,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560066980] [2021-06-05 22:07:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:56,448 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 22:07:56,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:56,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560066980] [2021-06-05 22:07:56,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560066980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:56,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230927863] [2021-06-05 22:07:56,448 INFO L93 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 22:07:56,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:56,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:56,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:07:56,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:56,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:56,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 22:07:56,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:56,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:56,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:56,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:56,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:56,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:07:56,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,055 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 22:07:57,056 INFO L628 ElimStorePlain]: treesize reduction 174, result has 50.0 percent of original size [2021-06-05 22:07:57,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:57,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:57,061 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 12 treesize of output 8 [2021-06-05 22:07:57,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:57,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:07:57,066 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,166 INFO L628 ElimStorePlain]: treesize reduction 28, result has 81.2 percent of original size [2021-06-05 22:07:57,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:57,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:07:57,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:57,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:07:57,219 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 22:07:57,219 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:82 [2021-06-05 22:07:57,386 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 22:07:57,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230927863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:57,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:57,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:07:57,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006866354] [2021-06-05 22:07:57,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:57,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:57,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:57,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:57,387 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 22:07:57,696 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-05 22:07:58,038 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:07:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:58,045 INFO L93 Difference]: Finished difference Result 957 states and 2965 transitions. [2021-06-05 22:07:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:58,045 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 22:07:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:58,047 INFO L225 Difference]: With dead ends: 957 [2021-06-05 22:07:58,047 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 22:07:58,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 22:07:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 633. [2021-06-05 22:07:58,053 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 22:07:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2075 transitions. [2021-06-05 22:07:58,054 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2075 transitions. Word has length 21 [2021-06-05 22:07:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:58,054 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2075 transitions. [2021-06-05 22:07:58,054 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 22:07:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2075 transitions. [2021-06-05 22:07:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:58,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:58,054 INFO L554 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 22:07:58,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5860 [2021-06-05 22:07:58,255 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash -893071312, now seen corresponding path program 601 times [2021-06-05 22:07:58,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:58,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539365158] [2021-06-05 22:07:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:58,392 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 22:07:58,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:58,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539365158] [2021-06-05 22:07:58,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539365158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:58,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925146978] [2021-06-05 22:07:58,392 INFO 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 22:07:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:07:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:58,761 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 6 treesize of output 4 [2021-06-05 22:07:58,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,765 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 13 treesize of output 9 [2021-06-05 22:07:58,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:07:58,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,773 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 12 treesize of output 8 [2021-06-05 22:07:58,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:07:58,777 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 11 treesize of output 7 [2021-06-05 22:07:58,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:07:58,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:07:58,821 INFO L628 ElimStorePlain]: treesize reduction 26, result has 66.7 percent of original size [2021-06-05 22:07:58,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:07:58,822 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:216, output treesize:30 [2021-06-05 22:07:58,881 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 22:07:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925146978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:58,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:58,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:07:58,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106782241] [2021-06-05 22:07:58,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:58,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:58,882 INFO L87 Difference]: Start difference. First operand 633 states and 2075 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 22:07:59,234 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-05 22:07:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:59,340 INFO L93 Difference]: Finished difference Result 867 states and 2694 transitions. [2021-06-05 22:07:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:59,340 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 22:07:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:59,341 INFO L225 Difference]: With dead ends: 867 [2021-06-05 22:07:59,341 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 22:07:59,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 22:07:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 587. [2021-06-05 22:07:59,347 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 22:07:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1888 transitions. [2021-06-05 22:07:59,348 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1888 transitions. Word has length 21 [2021-06-05 22:07:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:59,348 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1888 transitions. [2021-06-05 22:07:59,348 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 22:07:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1888 transitions. [2021-06-05 22:07:59,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:07:59,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:59,349 INFO L554 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 22:07:59,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5904,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:59,549 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash -276286010, now seen corresponding path program 602 times [2021-06-05 22:07:59,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:59,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638006920] [2021-06-05 22:07:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:59,701 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 22:07:59,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:59,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638006920] [2021-06-05 22:07:59,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638006920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104105770] [2021-06-05 22:07:59,702 INFO L93 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 22:07:59,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:59,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:59,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:07:59,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:00,217 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 5 treesize of output 3 [2021-06-05 22:08:00,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:00,221 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 22:08:00,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:00,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:00,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:00,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:00,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:00,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:00,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:00,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:00,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:00,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:00,237 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 1 [2021-06-05 22:08:00,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:00,312 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 22:08:00,314 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 22:08:00,314 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-06-05 22:08:00,403 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 22:08:00,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104105770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:00,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:00,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:08:00,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801539737] [2021-06-05 22:08:00,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:00,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:00,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:00,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:00,404 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 22:08:00,629 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 22:08:00,783 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-05 22:08:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:01,064 INFO L93 Difference]: Finished difference Result 765 states and 2430 transitions. [2021-06-05 22:08:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:01,064 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 22:08:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:01,065 INFO L225 Difference]: With dead ends: 765 [2021-06-05 22:08:01,065 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 22:08:01,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 22:08:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 612. [2021-06-05 22:08:01,071 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 22:08:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1978 transitions. [2021-06-05 22:08:01,071 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1978 transitions. Word has length 21 [2021-06-05 22:08:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:01,072 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1978 transitions. [2021-06-05 22:08:01,072 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 22:08:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1978 transitions. [2021-06-05 22:08:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:01,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:01,072 INFO L554 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 22:08:01,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-06-05 22:08:01,273 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1542291088, now seen corresponding path program 603 times [2021-06-05 22:08:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:01,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129465368] [2021-06-05 22:08:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:01,400 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 22:08:01,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:01,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129465368] [2021-06-05 22:08:01,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129465368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:01,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056398651] [2021-06-05 22:08:01,400 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 22:08:01,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:08:01,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:01,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:01,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:01,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:01,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:01,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,937 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 22:08:01,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 22:08:01,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 22:08:01,950 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:01,956 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 25 treesize of output 13 [2021-06-05 22:08:01,958 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:01,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:01,962 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:02,116 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 22:08:02,116 INFO L628 ElimStorePlain]: treesize reduction 34, result has 80.1 percent of original size [2021-06-05 22:08:02,118 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 22:08:02,119 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 22:08:02,387 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 22:08:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056398651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:02,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:02,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98127855] [2021-06-05 22:08:02,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:02,388 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 22:08:03,353 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 22:08:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:03,555 INFO L93 Difference]: Finished difference Result 809 states and 2536 transitions. [2021-06-05 22:08:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:08:03,555 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 22:08:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:03,556 INFO L225 Difference]: With dead ends: 809 [2021-06-05 22:08:03,556 INFO L226 Difference]: Without dead ends: 740 [2021-06-05 22:08:03,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1194.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-05 22:08:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 605. [2021-06-05 22:08:03,561 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 22:08:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1949 transitions. [2021-06-05 22:08:03,562 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1949 transitions. Word has length 21 [2021-06-05 22:08:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:03,562 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1949 transitions. [2021-06-05 22:08:03,562 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 22:08:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1949 transitions. [2021-06-05 22:08:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:03,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:03,563 INFO L554 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 22:08:03,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5974,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:03,763 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:03,764 INFO L82 PathProgramCache]: Analyzing trace with hash 481512998, now seen corresponding path program 604 times [2021-06-05 22:08:03,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:03,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217149747] [2021-06-05 22:08:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:03,890 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 22:08:03,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:03,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217149747] [2021-06-05 22:08:03,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217149747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:03,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533393603] [2021-06-05 22:08:03,891 INFO L93 rtionOrderModulation]: Changing 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 22:08:04,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:04,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:04,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:08:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:04,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:04,258 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 22:08:04,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:04,263 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 22:08:04,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:04,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:04,268 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 12 treesize of output 8 [2021-06-05 22:08:04,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:04,425 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 22:08:04,426 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-06-05 22:08:04,429 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 12 treesize of output 8 [2021-06-05 22:08:04,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:04,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:04,434 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 18 treesize of output 12 [2021-06-05 22:08:04,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:04,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:04,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:08:04,508 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:04,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:04,511 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 19 treesize of output 13 [2021-06-05 22:08:04,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:04,608 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.7 percent of original size [2021-06-05 22:08:04,610 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 22:08:04,610 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 22:08:04,772 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 22:08:04,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533393603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:04,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:04,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:08:04,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471730397] [2021-06-05 22:08:04,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:04,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:04,772 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 22:08:05,201 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-05 22:08:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:05,350 INFO L93 Difference]: Finished difference Result 890 states and 2751 transitions. [2021-06-05 22:08:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:05,351 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 22:08:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:05,352 INFO L225 Difference]: With dead ends: 890 [2021-06-05 22:08:05,352 INFO L226 Difference]: Without dead ends: 843 [2021-06-05 22:08:05,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-06-05 22:08:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 614. [2021-06-05 22:08:05,358 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 22:08:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1992 transitions. [2021-06-05 22:08:05,359 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1992 transitions. Word has length 21 [2021-06-05 22:08:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:05,359 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1992 transitions. [2021-06-05 22:08:05,359 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 22:08:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1992 transitions. [2021-06-05 22:08:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:05,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:05,360 INFO L554 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 22:08:05,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6046 [2021-06-05 22:08:05,560 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1901400646, now seen corresponding path program 605 times [2021-06-05 22:08:05,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:05,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564803055] [2021-06-05 22:08:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:05,697 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 22:08:05,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564803055] [2021-06-05 22:08:05,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564803055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:05,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289102087] [2021-06-05 22:08:05,698 INFO L93 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 22:08:05,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:06,147 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_181, v_prenex_183], 1=[v_prenex_182, nondet_0]} [2021-06-05 22:08:06,151 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 22:08:06,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:06,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:06,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:06,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:06,291 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 22:08:06,291 INFO L628 ElimStorePlain]: treesize reduction 217, result has 40.9 percent of original size [2021-06-05 22:08:06,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:06,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:06,390 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.6 percent of original size [2021-06-05 22:08:06,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:06,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:06,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:06,443 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 18 treesize of output 12 [2021-06-05 22:08:06,444 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:06,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:06,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:08:06,447 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:06,518 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 22:08:06,521 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 22:08:06,521 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 22:08:06,682 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 22:08:06,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289102087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:06,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:06,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:06,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987109724] [2021-06-05 22:08:06,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:06,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:06,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:06,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:06,683 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 22:08:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:07,554 INFO L93 Difference]: Finished difference Result 858 states and 2642 transitions. [2021-06-05 22:08:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:08:07,555 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 22:08:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:07,556 INFO L225 Difference]: With dead ends: 858 [2021-06-05 22:08:07,556 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 22:08:07,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 820.7ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 22:08:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 602. [2021-06-05 22:08:07,561 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 22:08:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1944 transitions. [2021-06-05 22:08:07,562 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1944 transitions. Word has length 21 [2021-06-05 22:08:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:07,562 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1944 transitions. [2021-06-05 22:08:07,562 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 22:08:07,563 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1944 transitions. [2021-06-05 22:08:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:07,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:07,563 INFO L554 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 22:08:07,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6096,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:07,764 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1957130576, now seen corresponding path program 606 times [2021-06-05 22:08:07,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:07,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580575566] [2021-06-05 22:08:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:07,884 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 22:08:07,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:07,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580575566] [2021-06-05 22:08:07,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580575566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835546645] [2021-06-05 22:08:07,885 INFO L93 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 22:08:08,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:08,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:08,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:08,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:08,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:08,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:08,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,485 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 17 treesize of output 8 [2021-06-05 22:08:08,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:08,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,646 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 22:08:08,647 INFO L628 ElimStorePlain]: treesize reduction 218, result has 44.2 percent of original size [2021-06-05 22:08:08,650 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 5 treesize of output 3 [2021-06-05 22:08:08,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:08:08,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,779 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 22:08:08,779 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-06-05 22:08:08,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,783 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 19 treesize of output 13 [2021-06-05 22:08:08,784 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:08,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:08,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:08,895 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 22:08:08,895 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 22:08:08,897 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 22:08:08,897 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:530, output treesize:89 [2021-06-05 22:08:09,114 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 22:08:09,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835546645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:09,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:09,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:08:09,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511725656] [2021-06-05 22:08:09,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:09,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:09,114 INFO L87 Difference]: Start difference. First operand 602 states and 1944 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 22:08:09,346 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 22:08:10,052 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 22:08:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:10,245 INFO L93 Difference]: Finished difference Result 933 states and 2848 transitions. [2021-06-05 22:08:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:10,246 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 22:08:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:10,247 INFO L225 Difference]: With dead ends: 933 [2021-06-05 22:08:10,247 INFO L226 Difference]: Without dead ends: 849 [2021-06-05 22:08:10,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1186.7ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-06-05 22:08:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 639. [2021-06-05 22:08:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.2868338557993733) internal successors, (2097), 638 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2097 transitions. [2021-06-05 22:08:10,254 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2097 transitions. Word has length 21 [2021-06-05 22:08:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:10,254 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2097 transitions. [2021-06-05 22:08:10,254 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 22:08:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2097 transitions. [2021-06-05 22:08:10,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:10,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:10,255 INFO L554 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 22:08:10,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 630 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6146 [2021-06-05 22:08:10,455 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash -704785328, now seen corresponding path program 607 times [2021-06-05 22:08:10,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:10,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241069694] [2021-06-05 22:08:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:10,588 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 22:08:10,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:10,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241069694] [2021-06-05 22:08:10,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241069694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:10,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991641956] [2021-06-05 22:08:10,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:08:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:10,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:08:10,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:10,975 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 22:08:11,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:08:11,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:11,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,252 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 25 treesize of output 13 [2021-06-05 22:08:11,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:11,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:11,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:11,388 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 22:08:11,389 INFO L628 ElimStorePlain]: treesize reduction 165, result has 45.4 percent of original size [2021-06-05 22:08:11,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:11,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:11,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:08:11,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:11,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:11,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:11,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:11,450 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:11,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:11,498 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 22:08:11,499 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:82 [2021-06-05 22:08:11,667 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 22:08:11,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991641956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:11,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:11,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:11,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337395401] [2021-06-05 22:08:11,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:11,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:11,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:11,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:11,667 INFO L87 Difference]: Start difference. First operand 639 states and 2097 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 22:08:11,889 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 22:08:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:12,384 INFO L93 Difference]: Finished difference Result 908 states and 2784 transitions. [2021-06-05 22:08:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:12,385 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 22:08:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:12,386 INFO L225 Difference]: With dead ends: 908 [2021-06-05 22:08:12,386 INFO L226 Difference]: Without dead ends: 854 [2021-06-05 22:08:12,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 902.2ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-06-05 22:08:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 632. [2021-06-05 22:08:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.266244057052298) internal successors, (2061), 631 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2061 transitions. [2021-06-05 22:08:12,393 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2061 transitions. Word has length 21 [2021-06-05 22:08:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:12,393 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2061 transitions. [2021-06-05 22:08:12,393 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 22:08:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2061 transitions. [2021-06-05 22:08:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:12,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:12,394 INFO L554 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 22:08:12,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6244 [2021-06-05 22:08:12,594 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:12,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1900239064, now seen corresponding path program 608 times [2021-06-05 22:08:12,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:12,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584191381] [2021-06-05 22:08:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:12,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:12,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584191381] [2021-06-05 22:08:12,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584191381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:12,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170544595] [2021-06-05 22:08:12,731 INFO L93 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 22:08:12,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:12,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:08:12,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:13,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:13,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:13,067 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 12 treesize of output 8 [2021-06-05 22:08:13,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:13,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:08:13,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:13,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:13,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:13,077 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 22:08:13,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:13,103 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 22:08:13,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:08:13,104 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-06-05 22:08:13,182 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 22:08:13,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170544595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:13,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:13,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:08:13,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033571310] [2021-06-05 22:08:13,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:08:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:08:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:13,183 INFO L87 Difference]: Start difference. First operand 632 states and 2061 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 22:08:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:14,107 INFO L93 Difference]: Finished difference Result 1173 states and 3532 transitions. [2021-06-05 22:08:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:14,107 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 22:08:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:14,109 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 22:08:14,109 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 22:08:14,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 788.3ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:08:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 22:08:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 625. [2021-06-05 22:08:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.2483974358974357) internal successors, (2027), 624 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2027 transitions. [2021-06-05 22:08:14,117 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2027 transitions. Word has length 21 [2021-06-05 22:08:14,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:14,117 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 2027 transitions. [2021-06-05 22:08:14,117 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 22:08:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2027 transitions. [2021-06-05 22:08:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:14,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:14,118 INFO L554 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 22:08:14,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6292,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:14,318 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash -905520364, now seen corresponding path program 609 times [2021-06-05 22:08:14,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:14,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712924593] [2021-06-05 22:08:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:14,445 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 22:08:14,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712924593] [2021-06-05 22:08:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712924593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451542090] [2021-06-05 22:08:14,445 INFO L93 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 22:08:14,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:14,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:08:14,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:14,763 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 11 treesize of output 7 [2021-06-05 22:08:14,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:14,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:14,768 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 5 treesize of output 3 [2021-06-05 22:08:14,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:14,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:14,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:14,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:14,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:14,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:08:14,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:14,799 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 22:08:14,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:08:14,799 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:149, output treesize:30 [2021-06-05 22:08:14,861 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 22:08:14,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451542090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:14,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:14,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:08:14,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248457089] [2021-06-05 22:08:14,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:08:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:08:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:14,862 INFO L87 Difference]: Start difference. First operand 625 states and 2027 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 22:08:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:15,668 INFO L93 Difference]: Finished difference Result 940 states and 2965 transitions. [2021-06-05 22:08:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:08:15,669 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 22:08:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:15,670 INFO L225 Difference]: With dead ends: 940 [2021-06-05 22:08:15,670 INFO L226 Difference]: Without dead ends: 871 [2021-06-05 22:08:15,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 686.1ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:08:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-05 22:08:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 629. [2021-06-05 22:08:15,676 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 22:08:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2025 transitions. [2021-06-05 22:08:15,677 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2025 transitions. Word has length 21 [2021-06-05 22:08:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:15,677 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2025 transitions. [2021-06-05 22:08:15,677 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 22:08:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2025 transitions. [2021-06-05 22:08:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:15,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:15,678 INFO L554 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 22:08:15,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6306 [2021-06-05 22:08:15,878 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 671100815, now seen corresponding path program 22 times [2021-06-05 22:08:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:15,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573411842] [2021-06-05 22:08:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:15,957 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 22:08:15,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:15,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573411842] [2021-06-05 22:08:15,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573411842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:15,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710250696] [2021-06-05 22:08:15,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:08:16,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:16,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:16,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:16,211 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 22:08:16,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710250696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:16,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:16,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:08:16,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523092450] [2021-06-05 22:08:16,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:16,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:16,212 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 22:08:17,699 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-06-05 22:08:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:17,970 INFO L93 Difference]: Finished difference Result 1261 states and 3687 transitions. [2021-06-05 22:08:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:08:17,971 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 22:08:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:17,972 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 22:08:17,972 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 22:08:17,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1421.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:08:17,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 22:08:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 632. [2021-06-05 22:08:17,979 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 22:08:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2021 transitions. [2021-06-05 22:08:17,980 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2021 transitions. Word has length 21 [2021-06-05 22:08:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:17,980 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2021 transitions. [2021-06-05 22:08:17,980 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 22:08:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2021 transitions. [2021-06-05 22:08:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:17,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:17,981 INFO L554 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 22:08:18,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 634 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6322 [2021-06-05 22:08:18,181 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 989891146, now seen corresponding path program 610 times [2021-06-05 22:08:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:18,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056993578] [2021-06-05 22:08:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:18,268 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 22:08:18,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:18,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056993578] [2021-06-05 22:08:18,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056993578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:18,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316264429] [2021-06-05 22:08:18,268 INFO L93 rtionOrderModulation]: Changing 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 22:08:18,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:18,521 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 18 treesize of output 12 [2021-06-05 22:08:18,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:18,524 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 5 treesize of output 3 [2021-06-05 22:08:18,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:18,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:18,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:18,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:18,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:18,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:08:18,548 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 22:08:18,672 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 22:08:18,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316264429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:18,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:18,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:08:18,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274159429] [2021-06-05 22:08:18,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:18,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:18,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:18,673 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 22:08:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:19,583 INFO L93 Difference]: Finished difference Result 968 states and 2993 transitions. [2021-06-05 22:08:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:08:19,584 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 22:08:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:19,585 INFO L225 Difference]: With dead ends: 968 [2021-06-05 22:08:19,585 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 22:08:19,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 758.3ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:08:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 22:08:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 651. [2021-06-05 22:08:19,591 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 22:08:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2096 transitions. [2021-06-05 22:08:19,592 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2096 transitions. Word has length 21 [2021-06-05 22:08:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:19,592 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 2096 transitions. [2021-06-05 22:08:19,592 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 22:08:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2096 transitions. [2021-06-05 22:08:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:19,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:19,593 INFO L554 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 22:08:19,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6328,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:19,793 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1531206336, now seen corresponding path program 611 times [2021-06-05 22:08:19,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:19,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273249993] [2021-06-05 22:08:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:19,898 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 22:08:19,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:19,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273249993] [2021-06-05 22:08:19,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273249993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:19,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999821767] [2021-06-05 22:08:19,899 INFO L93 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 22:08:20,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:20,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:20,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:20,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:20,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:20,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:20,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:20,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:20,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:20,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:20,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:20,455 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.7 percent of original size [2021-06-05 22:08:20,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:20,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:20,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:20,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:20,485 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 22:08:20,485 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-06-05 22:08:20,622 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 22:08:20,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999821767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:20,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:20,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:08:20,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899610401] [2021-06-05 22:08:20,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:20,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:20,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:20,623 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 22:08:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:21,602 INFO L93 Difference]: Finished difference Result 908 states and 2840 transitions. [2021-06-05 22:08:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:21,603 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 22:08:21,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:21,604 INFO L225 Difference]: With dead ends: 908 [2021-06-05 22:08:21,604 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 22:08:21,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 937.7ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:08:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 22:08:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 658. [2021-06-05 22:08:21,610 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 22:08:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2125 transitions. [2021-06-05 22:08:21,611 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2125 transitions. Word has length 21 [2021-06-05 22:08:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:21,611 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2125 transitions. [2021-06-05 22:08:21,611 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 22:08:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2125 transitions. [2021-06-05 22:08:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:21,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:21,612 INFO L554 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 22:08:21,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6344 [2021-06-05 22:08:21,812 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash -945183862, now seen corresponding path program 612 times [2021-06-05 22:08:21,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:21,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655457125] [2021-06-05 22:08:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:21,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:21,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655457125] [2021-06-05 22:08:21,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655457125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:21,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111081] [2021-06-05 22:08:21,922 INFO L93 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 22:08:22,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:22,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:08:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:22,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:22,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:22,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,188 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 18 treesize of output 12 [2021-06-05 22:08:22,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,193 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 11 treesize of output 7 [2021-06-05 22:08:22,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,197 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 12 treesize of output 8 [2021-06-05 22:08:22,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,202 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 17 treesize of output 11 [2021-06-05 22:08:22,203 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:22,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:22,212 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:22,217 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,221 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 18 treesize of output 12 [2021-06-05 22:08:22,222 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:22,226 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:22,347 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 22:08:22,348 INFO L628 ElimStorePlain]: treesize reduction 64, result has 62.6 percent of original size [2021-06-05 22:08:22,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:08:22,349 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:401, output treesize:107 [2021-06-05 22:08:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:22,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:22,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:22,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:22,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011547724] [2021-06-05 22:08:22,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:22,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:22,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:22,503 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 22:08:22,923 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 22:08:23,081 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:08:23,242 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 22:08:23,419 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 22:08:23,560 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:08:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:23,638 INFO L93 Difference]: Finished difference Result 1121 states and 3412 transitions. [2021-06-05 22:08:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:08:23,638 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 22:08:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:23,639 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 22:08:23,639 INFO L226 Difference]: Without dead ends: 980 [2021-06-05 22:08:23,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1054.8ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-06-05 22:08:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 672. [2021-06-05 22:08:23,646 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 22:08:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2190 transitions. [2021-06-05 22:08:23,647 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2190 transitions. Word has length 21 [2021-06-05 22:08:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:23,647 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2190 transitions. [2021-06-05 22:08:23,647 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 22:08:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2190 transitions. [2021-06-05 22:08:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:23,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:23,647 INFO L554 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 22:08:23,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6391,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:23,848 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:23,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1288143382, now seen corresponding path program 613 times [2021-06-05 22:08:23,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:23,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6007533] [2021-06-05 22:08:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:23,986 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 22:08:23,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:23,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6007533] [2021-06-05 22:08:23,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6007533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:23,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933572346] [2021-06-05 22:08:23,986 INFO 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 22:08:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:24,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:24,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:24,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:24,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:08:24,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:08:24,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:24,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:24,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:24,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:24,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:08:24,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 22:08:24,404 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 22:08:24,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933572346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:24,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:24,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 22:08:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122033770] [2021-06-05 22:08:24,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:08:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:08:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:24,405 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 22:08:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:25,370 INFO L93 Difference]: Finished difference Result 991 states and 3102 transitions. [2021-06-05 22:08:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:25,370 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 22:08:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:25,371 INFO L225 Difference]: With dead ends: 991 [2021-06-05 22:08:25,371 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 22:08:25,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 828.0ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:08:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 22:08:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 692. [2021-06-05 22:08:25,378 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 22:08:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 22:08:25,380 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 22:08:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:25,380 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 22:08:25,380 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 22:08:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 22:08:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:25,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:25,381 INFO L554 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 22:08:25,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6410 [2021-06-05 22:08:25,581 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 530433716, now seen corresponding path program 614 times [2021-06-05 22:08:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:25,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968017996] [2021-06-05 22:08:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:25,704 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 22:08:25,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:25,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968017996] [2021-06-05 22:08:25,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968017996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:25,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805321423] [2021-06-05 22:08:25,704 INFO L93 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 22:08:25,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:25,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:08:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:26,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:26,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:26,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:08:26,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:08:26,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,264 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 18 treesize of output 1 [2021-06-05 22:08:26,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 22:08:26,271 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:26,276 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,281 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 23 treesize of output 1 [2021-06-05 22:08:26,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:26,287 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:08:26,293 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,298 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 17 treesize of output 8 [2021-06-05 22:08:26,298 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,303 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 24 treesize of output 1 [2021-06-05 22:08:26,303 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,474 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 22:08:26,475 INFO L628 ElimStorePlain]: treesize reduction 79, result has 70.4 percent of original size [2021-06-05 22:08:26,477 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 22:08:26,477 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:646, output treesize:108 [2021-06-05 22:08:26,684 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 22:08:26,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805321423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:26,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:26,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:08:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065681281] [2021-06-05 22:08:26,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:26,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:26,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:26,685 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 22:08:27,087 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 22:08:27,241 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 22:08:27,400 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 22:08:27,543 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 22:08:27,686 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 22:08:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:27,737 INFO L93 Difference]: Finished difference Result 940 states and 2947 transitions. [2021-06-05 22:08:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:27,737 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 22:08:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:27,739 INFO L225 Difference]: With dead ends: 940 [2021-06-05 22:08:27,739 INFO L226 Difference]: Without dead ends: 846 [2021-06-05 22:08:27,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-05 22:08:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 692. [2021-06-05 22:08:27,745 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 22:08:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 22:08:27,747 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 22:08:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:27,747 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 22:08:27,747 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 22:08:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 22:08:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:27,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:27,748 INFO L554 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 22:08:27,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6425,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:27,948 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash -530344374, now seen corresponding path program 615 times [2021-06-05 22:08:27,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:27,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425963941] [2021-06-05 22:08:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:28,081 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 22:08:28,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:28,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425963941] [2021-06-05 22:08:28,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425963941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:28,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517822235] [2021-06-05 22:08:28,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:08:28,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:08:28,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:08:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:28,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:28,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:28,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:28,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:08:28,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:28,712 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,717 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 18 treesize of output 8 [2021-06-05 22:08:28,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:28,723 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:28,729 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,734 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 1 [2021-06-05 22:08:28,734 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:28,739 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:08:28,744 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,871 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:08:28,872 INFO L628 ElimStorePlain]: treesize reduction 71, result has 67.4 percent of original size [2021-06-05 22:08:28,873 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 22:08:28,873 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-06-05 22:08:29,036 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 22:08:29,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517822235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:29,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:29,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:08:29,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397655835] [2021-06-05 22:08:29,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:29,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:29,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:29,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:29,037 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 22:08:29,693 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 22:08:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:29,952 INFO L93 Difference]: Finished difference Result 1079 states and 3345 transitions. [2021-06-05 22:08:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:29,952 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 22:08:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:29,953 INFO L225 Difference]: With dead ends: 1079 [2021-06-05 22:08:29,953 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 22:08:29,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 946.3ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 22:08:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 706. [2021-06-05 22:08:29,960 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 22:08:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2338 transitions. [2021-06-05 22:08:29,962 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2338 transitions. Word has length 21 [2021-06-05 22:08:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:29,962 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2338 transitions. [2021-06-05 22:08:29,962 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 22:08:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2338 transitions. [2021-06-05 22:08:29,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:29,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:29,962 INFO L554 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 22:08:30,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6497 [2021-06-05 22:08:30,163 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash 889543274, now seen corresponding path program 616 times [2021-06-05 22:08:30,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:30,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326908940] [2021-06-05 22:08:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:30,285 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 22:08:30,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326908940] [2021-06-05 22:08:30,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326908940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751699033] [2021-06-05 22:08:30,285 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 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 22:08:30,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:30,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:30,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:30,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:30,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,748 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 18 treesize of output 1 [2021-06-05 22:08:30,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:30,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:08:30,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:30,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:30,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:30,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:30,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:30,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:30,778 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 18 treesize of output 12 [2021-06-05 22:08:30,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:30,860 INFO L628 ElimStorePlain]: treesize reduction 44, result has 69.2 percent of original size [2021-06-05 22:08:30,862 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 22:08:30,862 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-06-05 22:08:31,030 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 22:08:31,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751699033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:31,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:31,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:31,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771279059] [2021-06-05 22:08:31,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:31,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:31,031 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 22:08:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:31,967 INFO L93 Difference]: Finished difference Result 970 states and 3035 transitions. [2021-06-05 22:08:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:31,967 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 22:08:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:31,969 INFO L225 Difference]: With dead ends: 970 [2021-06-05 22:08:31,969 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 22:08:31,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 979.2ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:08:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 22:08:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 692. [2021-06-05 22:08:31,975 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 22:08:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 22:08:31,976 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 22:08:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:31,977 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 22:08:31,977 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 22:08:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 22:08:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:31,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:31,978 INFO L554 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 22:08:32,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6615,641 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:32,178 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:32,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1506328576, now seen corresponding path program 617 times [2021-06-05 22:08:32,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:32,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656719544] [2021-06-05 22:08:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:32,309 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 22:08:32,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:32,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656719544] [2021-06-05 22:08:32,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656719544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:32,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215637942] [2021-06-05 22:08:32,309 INFO L93 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 22:08:32,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:32,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:32,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:08:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:32,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:08:32,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:32,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:08:32,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:32,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:32,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:32,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:32,727 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 18 treesize of output 8 [2021-06-05 22:08:32,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:32,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:32,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:32,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:32,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:32,737 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 22:08:32,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:32,814 INFO L628 ElimStorePlain]: treesize reduction 29, result has 76.2 percent of original size [2021-06-05 22:08:32,815 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 22:08:32,816 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-06-05 22:08:32,896 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 22:08:32,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215637942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:32,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:32,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:08:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274690998] [2021-06-05 22:08:32,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:32,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:32,897 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 22:08:33,237 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 22:08:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:33,508 INFO L93 Difference]: Finished difference Result 872 states and 2822 transitions. [2021-06-05 22:08:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:33,508 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 22:08:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:33,509 INFO L225 Difference]: With dead ends: 872 [2021-06-05 22:08:33,509 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 22:08:33,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 22:08:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 710. [2021-06-05 22:08:33,516 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 22:08:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-06-05 22:08:33,517 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-06-05 22:08:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:33,517 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-06-05 22:08:33,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-06-05 22:08:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:33,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:33,518 INFO L554 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 22:08:33,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6665,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:33,718 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash -970061622, now seen corresponding path program 618 times [2021-06-05 22:08:33,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:33,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70357986] [2021-06-05 22:08:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:33,837 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 22:08:33,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70357986] [2021-06-05 22:08:33,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70357986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161505704] [2021-06-05 22:08:33,837 INFO L93 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 22:08:33,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:33,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:33,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:08:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:34,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,319 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 17 treesize of output 8 [2021-06-05 22:08:34,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:34,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:34,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:34,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:34,341 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,346 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 25 treesize of output 13 [2021-06-05 22:08:34,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:34,351 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:08:34,356 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:34,361 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,530 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 22:08:34,530 INFO L628 ElimStorePlain]: treesize reduction 5, result has 97.4 percent of original size [2021-06-05 22:08:34,534 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 22:08:34,534 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-06-05 22:08:34,735 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 22:08:34,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161505704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:34,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:34,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:08:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980255472] [2021-06-05 22:08:34,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:34,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:34,736 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 22:08:35,120 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 22:08:35,285 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:08:35,443 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 22:08:35,619 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 22:08:35,758 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:08:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:35,830 INFO L93 Difference]: Finished difference Result 1096 states and 3417 transitions. [2021-06-05 22:08:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:08:35,830 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 22:08:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:35,831 INFO L225 Difference]: With dead ends: 1096 [2021-06-05 22:08:35,831 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 22:08:35,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1109.3ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 22:08:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 710. [2021-06-05 22:08:35,838 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 22:08:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-06-05 22:08:35,839 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-06-05 22:08:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:35,839 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-06-05 22:08:35,839 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 22:08:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-06-05 22:08:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:35,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:35,840 INFO L554 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 22:08:36,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6702 [2021-06-05 22:08:36,041 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2030839712, now seen corresponding path program 619 times [2021-06-05 22:08:36,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:36,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856516158] [2021-06-05 22:08:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:36,171 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 22:08:36,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856516158] [2021-06-05 22:08:36,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856516158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83153860] [2021-06-05 22:08:36,171 INFO 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 22:08:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:36,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:36,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:08:36,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:08:36,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,768 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 22:08:36,768 INFO L628 ElimStorePlain]: treesize reduction 175, result has 49.7 percent of original size [2021-06-05 22:08:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:36,773 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 19 treesize of output 13 [2021-06-05 22:08:36,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:36,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:36,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:36,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:36,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:36,880 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 22:08:36,880 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:82 [2021-06-05 22:08:37,160 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 22:08:37,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83153860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:37,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:37,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772693052] [2021-06-05 22:08:37,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:37,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:37,161 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 22:08:37,497 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-05 22:08:37,658 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 22:08:37,829 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 22:08:37,961 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-05 22:08:38,119 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 22:08:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:38,126 INFO L93 Difference]: Finished difference Result 1025 states and 3210 transitions. [2021-06-05 22:08:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:38,127 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 22:08:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:38,128 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 22:08:38,128 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 22:08:38,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1082.0ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 22:08:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 719. [2021-06-05 22:08:38,135 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 22:08:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2373 transitions. [2021-06-05 22:08:38,136 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2373 transitions. Word has length 21 [2021-06-05 22:08:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:38,136 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2373 transitions. [2021-06-05 22:08:38,136 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 22:08:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2373 transitions. [2021-06-05 22:08:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:38,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:38,137 INFO L554 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 22:08:38,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6776,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:38,338 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash -610952064, now seen corresponding path program 620 times [2021-06-05 22:08:38,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:38,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038210055] [2021-06-05 22:08:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:38,485 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 22:08:38,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:38,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038210055] [2021-06-05 22:08:38,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038210055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:38,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088685076] [2021-06-05 22:08:38,485 INFO L93 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 22:08:38,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:38,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:38,988 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_209, v_prenex_211], 1=[v_prenex_210, nondet_0]} [2021-06-05 22:08:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:38,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:08:39,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,005 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 22:08:39,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,144 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 22:08:39,144 INFO L628 ElimStorePlain]: treesize reduction 241, result has 37.7 percent of original size [2021-06-05 22:08:39,147 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 22:08:39,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,241 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 22:08:39,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:08:39,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:39,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:08:39,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:39,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:39,296 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:39,368 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 22:08:39,370 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 22:08:39,370 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 22:08:39,533 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 22:08:39,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088685076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:39,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:39,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:39,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585258892] [2021-06-05 22:08:39,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:39,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:39,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:39,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:39,533 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 22:08:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:40,438 INFO L93 Difference]: Finished difference Result 1026 states and 3191 transitions. [2021-06-05 22:08:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:40,439 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 22:08:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:40,440 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 22:08:40,440 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 22:08:40,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 843.5ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 22:08:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2021-06-05 22:08:40,447 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 22:08:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-06-05 22:08:40,448 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-06-05 22:08:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:40,448 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-06-05 22:08:40,448 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 22:08:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-06-05 22:08:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:40,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:40,449 INFO L554 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 22:08:40,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6838 [2021-06-05 22:08:40,649 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash -555222134, now seen corresponding path program 621 times [2021-06-05 22:08:40,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:40,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924960161] [2021-06-05 22:08:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:40,771 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 22:08:40,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:40,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924960161] [2021-06-05 22:08:40,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924960161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:40,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701062645] [2021-06-05 22:08:40,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:08:40,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:08:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:41,095 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:08:41,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:41,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:41,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 22:08:41,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:41,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:41,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:08:41,413 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:08:41,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:41,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:41,428 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 18 treesize of output 1 [2021-06-05 22:08:41,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,562 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 22:08:41,563 INFO L628 ElimStorePlain]: treesize reduction 120, result has 54.9 percent of original size [2021-06-05 22:08:41,565 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 22:08:41,565 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-06-05 22:08:41,838 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 22:08:41,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701062645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:41,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:41,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:08:41,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157571995] [2021-06-05 22:08:41,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:41,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:41,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:41,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:41,839 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 22:08:42,104 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 22:08:42,385 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 22:08:42,555 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-06-05 22:08:42,678 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 22:08:42,825 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 22:08:42,964 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 22:08:43,119 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 22:08:43,281 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-05 22:08:43,437 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 22:08:43,573 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 22:08:43,823 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 22:08:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:43,892 INFO L93 Difference]: Finished difference Result 1124 states and 3466 transitions. [2021-06-05 22:08:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:08:43,893 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 22:08:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:43,894 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 22:08:43,894 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 22:08:43,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2176.9ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:08:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 22:08:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 751. [2021-06-05 22:08:43,902 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 22:08:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2485 transitions. [2021-06-05 22:08:43,903 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2485 transitions. Word has length 21 [2021-06-05 22:08:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:43,903 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2485 transitions. [2021-06-05 22:08:43,903 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 22:08:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2485 transitions. [2021-06-05 22:08:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:43,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:43,904 INFO L554 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 22:08:44,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6917 [2021-06-05 22:08:44,104 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash 864665514, now seen corresponding path program 622 times [2021-06-05 22:08:44,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:44,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113177653] [2021-06-05 22:08:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:44,223 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 22:08:44,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:44,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113177653] [2021-06-05 22:08:44,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113177653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:44,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857598795] [2021-06-05 22:08:44,224 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 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 22:08:44,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:44,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:44,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:44,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:44,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:44,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:44,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:44,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:44,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:44,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,744 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 24 treesize of output 12 [2021-06-05 22:08:44,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:44,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:44,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:44,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:44,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:08:44,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:44,834 INFO L628 ElimStorePlain]: treesize reduction 40, result has 71.2 percent of original size [2021-06-05 22:08:44,836 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 22:08:44,836 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-06-05 22:08:45,011 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 22:08:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857598795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:45,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:45,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:08:45,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039863303] [2021-06-05 22:08:45,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:45,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:45,011 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 22:08:45,285 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 22:08:45,596 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 22:08:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:46,228 INFO L93 Difference]: Finished difference Result 1032 states and 3203 transitions. [2021-06-05 22:08:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:46,228 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 22:08:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:46,229 INFO L225 Difference]: With dead ends: 1032 [2021-06-05 22:08:46,229 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 22:08:46,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1242.3ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 22:08:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 742. [2021-06-05 22:08:46,236 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 22:08:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2442 transitions. [2021-06-05 22:08:46,238 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2442 transitions. Word has length 21 [2021-06-05 22:08:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:46,238 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2442 transitions. [2021-06-05 22:08:46,238 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 22:08:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2442 transitions. [2021-06-05 22:08:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:46,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:46,239 INFO L554 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 22:08:46,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6993,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:46,439 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash 16043042, now seen corresponding path program 623 times [2021-06-05 22:08:46,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:46,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999520490] [2021-06-05 22:08:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:46,555 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 22:08:46,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:46,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999520490] [2021-06-05 22:08:46,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999520490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:46,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330049377] [2021-06-05 22:08:46,556 INFO L93 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 22:08:46,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:46,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:47,157 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 12 treesize of output 8 [2021-06-05 22:08:47,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:08:47,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:47,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:08:47,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:47,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:08:47,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:08:47,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 22:08:47,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:47,193 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 18 treesize of output 1 [2021-06-05 22:08:47,193 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:47,299 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 22:08:47,299 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-06-05 22:08:47,301 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 22:08:47,301 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:376, output treesize:74 [2021-06-05 22:08:47,469 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 22:08:47,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330049377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:47,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:47,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:08:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259327458] [2021-06-05 22:08:47,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:47,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:47,470 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 22:08:47,723 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 22:08:47,912 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 22:08:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:48,649 INFO L93 Difference]: Finished difference Result 995 states and 3138 transitions. [2021-06-05 22:08:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:48,649 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 22:08:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:48,651 INFO L225 Difference]: With dead ends: 995 [2021-06-05 22:08:48,651 INFO L226 Difference]: Without dead ends: 926 [2021-06-05 22:08:48,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1188.5ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:08:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-06-05 22:08:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 733. [2021-06-05 22:08:48,658 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 22:08:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-06-05 22:08:48,659 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-06-05 22:08:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-06-05 22:08:48,659 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 22:08:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-06-05 22:08:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:48,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:48,660 INFO L554 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 22:08:48,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7045 [2021-06-05 22:08:48,860 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash -195510068, now seen corresponding path program 624 times [2021-06-05 22:08:48,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:48,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861101847] [2021-06-05 22:08:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:48,979 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 22:08:48,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:48,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861101847] [2021-06-05 22:08:48,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861101847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:48,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393094143] [2021-06-05 22:08:48,979 INFO L93 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 22:08:49,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:49,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:49,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,523 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 11 treesize of output 7 [2021-06-05 22:08:49,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,527 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 24 treesize of output 1 [2021-06-05 22:08:49,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:49,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,536 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 17 treesize of output 8 [2021-06-05 22:08:49,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,540 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 18 treesize of output 12 [2021-06-05 22:08:49,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 22:08:49,545 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,549 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 12 treesize of output 8 [2021-06-05 22:08:49,549 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:49,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:49,553 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:49,632 INFO L628 ElimStorePlain]: treesize reduction 69, result has 56.6 percent of original size [2021-06-05 22:08:49,634 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 22:08:49,634 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:347, output treesize:48 [2021-06-05 22:08:49,755 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 22:08:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393094143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:49,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:49,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:49,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245186251] [2021-06-05 22:08:49,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:49,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:49,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:49,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:49,756 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 22:08:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:50,556 INFO L93 Difference]: Finished difference Result 952 states and 3054 transitions. [2021-06-05 22:08:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:50,556 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 22:08:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:50,558 INFO L225 Difference]: With dead ends: 952 [2021-06-05 22:08:50,558 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 22:08:50,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 22:08:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 739. [2021-06-05 22:08:50,564 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 22:08:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-06-05 22:08:50,565 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-06-05 22:08:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:50,566 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-06-05 22:08:50,566 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 22:08:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-06-05 22:08:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:50,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:50,566 INFO L554 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 22:08:50,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7102 [2021-06-05 22:08:50,767 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1623067030, now seen corresponding path program 625 times [2021-06-05 22:08:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:50,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454296446] [2021-06-05 22:08:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:50,885 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 22:08:50,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:50,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454296446] [2021-06-05 22:08:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454296446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062316250] [2021-06-05 22:08:50,886 INFO 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 22:08:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:51,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:51,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:51,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,339 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 18 treesize of output 12 [2021-06-05 22:08:51,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:51,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:51,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:51,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,359 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 18 treesize of output 1 [2021-06-05 22:08:51,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:51,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:51,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 22:08:51,372 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:51,430 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 22:08:51,430 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 22:08:51,631 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 22:08:51,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062316250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:51,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:51,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:51,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043627541] [2021-06-05 22:08:51,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:51,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:51,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:51,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:51,632 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 22:08:52,535 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 22:08:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:52,726 INFO L93 Difference]: Finished difference Result 965 states and 3081 transitions. [2021-06-05 22:08:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:08:52,726 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 22:08:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:52,727 INFO L225 Difference]: With dead ends: 965 [2021-06-05 22:08:52,727 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 22:08:52,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1145.3ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 22:08:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-06-05 22:08:52,734 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 22:08:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-06-05 22:08:52,735 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-06-05 22:08:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:52,735 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-06-05 22:08:52,735 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 22:08:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-06-05 22:08:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:52,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:52,736 INFO L554 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 22:08:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7160 [2021-06-05 22:08:52,937 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash 562288940, now seen corresponding path program 626 times [2021-06-05 22:08:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142368885] [2021-06-05 22:08:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:53,059 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 22:08:53,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:53,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142368885] [2021-06-05 22:08:53,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142368885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:53,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335777781] [2021-06-05 22:08:53,059 INFO L93 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 22:08:53,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:53,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:53,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:53,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:53,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:53,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:53,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:53,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 22:08:53,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 22:08:53,661 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:53,667 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:53,674 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:53,678 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:53,681 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 17 treesize of output 8 [2021-06-05 22:08:53,682 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:53,810 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:08:53,810 INFO L628 ElimStorePlain]: treesize reduction 71, result has 67.4 percent of original size [2021-06-05 22:08:53,812 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 22:08:53,812 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-06-05 22:08:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:54,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335777781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:54,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:54,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:54,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283385006] [2021-06-05 22:08:54,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:54,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:54,063 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 22:08:55,109 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 22:08:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:55,559 INFO L93 Difference]: Finished difference Result 1143 states and 3515 transitions. [2021-06-05 22:08:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:08:55,559 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 22:08:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:55,560 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 22:08:55,560 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 22:08:55,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1474.1ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:08:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 22:08:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 748. [2021-06-05 22:08:55,568 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 22:08:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2470 transitions. [2021-06-05 22:08:55,569 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2470 transitions. Word has length 21 [2021-06-05 22:08:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:55,569 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2470 transitions. [2021-06-05 22:08:55,569 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 22:08:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2470 transitions. [2021-06-05 22:08:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:55,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:55,570 INFO L554 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 22:08:55,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7200 [2021-06-05 22:08:55,770 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1982176588, now seen corresponding path program 627 times [2021-06-05 22:08:55,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:55,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490138553] [2021-06-05 22:08:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:55,889 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 22:08:55,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490138553] [2021-06-05 22:08:55,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490138553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993979898] [2021-06-05 22:08:55,890 INFO L93 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 22:08:56,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:56,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:56,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:56,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:08:56,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:56,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:56,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,409 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 5 treesize of output 3 [2021-06-05 22:08:56,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:56,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:08:56,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:08:56,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:56,427 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 22:08:56,431 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:56,435 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:56,439 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,542 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-06-05 22:08:56,542 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 22:08:56,544 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 22:08:56,545 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 22:08:56,704 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 22:08:56,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993979898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:56,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:56,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:08:56,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570749045] [2021-06-05 22:08:56,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:56,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:56,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:56,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:56,705 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 22:08:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:57,564 INFO L93 Difference]: Finished difference Result 1014 states and 3187 transitions. [2021-06-05 22:08:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:08:57,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:08:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:57,565 INFO L225 Difference]: With dead ends: 1014 [2021-06-05 22:08:57,565 INFO L226 Difference]: Without dead ends: 945 [2021-06-05 22:08:57,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 890.9ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-05 22:08:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 730. [2021-06-05 22:08:57,572 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 22:08:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2393 transitions. [2021-06-05 22:08:57,573 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2393 transitions. Word has length 21 [2021-06-05 22:08:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:57,573 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2393 transitions. [2021-06-05 22:08:57,574 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 22:08:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2393 transitions. [2021-06-05 22:08:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:08:57,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:57,574 INFO L554 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 22:08:57,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7318 [2021-06-05 22:08:57,775 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:57,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2037906518, now seen corresponding path program 628 times [2021-06-05 22:08:57,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:57,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646525644] [2021-06-05 22:08:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:57,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:57,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646525644] [2021-06-05 22:08:57,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646525644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:57,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100435960] [2021-06-05 22:08:57,895 INFO L93 rtionOrderModulation]: Changing 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 22:08:58,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:58,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:08:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:58,205 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 22:08:58,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:58,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,631 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 22:08:58,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:58,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:58,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:08:58,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:58,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:58,666 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:08:58,672 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:08:58,677 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 22:08:58,682 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:58,686 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:58,689 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,817 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:08:58,818 INFO L628 ElimStorePlain]: treesize reduction 79, result has 65.0 percent of original size [2021-06-05 22:08:58,820 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 22:08:58,820 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-06-05 22:08:59,085 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 22:08:59,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100435960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:59,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:59,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:08:59,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378781136] [2021-06-05 22:08:59,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:59,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:59,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:59,086 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 22:08:59,343 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 22:09:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:00,838 INFO L93 Difference]: Finished difference Result 1141 states and 3509 transitions. [2021-06-05 22:09:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:09:00,838 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 22:09:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:00,840 INFO L225 Difference]: With dead ends: 1141 [2021-06-05 22:09:00,840 INFO L226 Difference]: Without dead ends: 1003 [2021-06-05 22:09:00,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1866.5ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:09:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-05 22:09:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 748. [2021-06-05 22:09:00,847 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 22:09:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2472 transitions. [2021-06-05 22:09:00,848 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2472 transitions. Word has length 21 [2021-06-05 22:09:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:00,848 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2472 transitions. [2021-06-05 22:09:00,848 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 22:09:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2472 transitions. [2021-06-05 22:09:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:09:00,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:00,849 INFO L554 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 22:09:01,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7362,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:01,050 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -837173130, now seen corresponding path program 629 times [2021-06-05 22:09:01,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:01,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214989137] [2021-06-05 22:09:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:01,172 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 22:09:01,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:01,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214989137] [2021-06-05 22:09:01,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214989137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:01,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927343442] [2021-06-05 22:09:01,172 INFO L93 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 22:09:01,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:01,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:09:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:01,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:09:01,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,747 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 12 treesize of output 8 [2021-06-05 22:09:01,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,751 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 24 treesize of output 1 [2021-06-05 22:09:01,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,755 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 13 treesize of output 9 [2021-06-05 22:09:01,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,760 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 17 treesize of output 8 [2021-06-05 22:09:01,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:01,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,769 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 13 treesize of output 9 [2021-06-05 22:09:01,770 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:01,774 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,778 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 18 treesize of output 1 [2021-06-05 22:09:01,779 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:09:01,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,786 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 5 treesize of output 3 [2021-06-05 22:09:01,787 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:01,790 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 18 treesize of output 12 [2021-06-05 22:09:01,791 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:01,899 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 22:09:01,900 INFO L628 ElimStorePlain]: treesize reduction 86, result has 60.6 percent of original size [2021-06-05 22:09:01,902 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 22:09:01,902 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 22:09:02,071 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 22:09:02,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927343442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:02,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:02,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:09:02,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886443350] [2021-06-05 22:09:02,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:02,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:02,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:02,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:02,072 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 22:09:02,342 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 22:09:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:03,286 INFO L93 Difference]: Finished difference Result 1164 states and 3546 transitions. [2021-06-05 22:09:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:09:03,286 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 22:09:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:03,288 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 22:09:03,288 INFO L226 Difference]: Without dead ends: 1080 [2021-06-05 22:09:03,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1147.8ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:09:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-06-05 22:09:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 751. [2021-06-05 22:09:03,296 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 22:09:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2467 transitions. [2021-06-05 22:09:03,297 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2467 transitions. Word has length 21 [2021-06-05 22:09:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:03,297 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2467 transitions. [2021-06-05 22:09:03,297 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 22:09:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2467 transitions. [2021-06-05 22:09:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:09:03,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:03,298 INFO L554 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 22:09:03,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7478 [2021-06-05 22:09:03,498 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1132392534, now seen corresponding path program 630 times [2021-06-05 22:09:03,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:03,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703778089] [2021-06-05 22:09:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:03,641 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 22:09:03,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:03,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703778089] [2021-06-05 22:09:03,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703778089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:03,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784642609] [2021-06-05 22:09:03,641 INFO L93 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 22:09:03,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:03,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:09:03,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:03,947 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 11 treesize of output 7 [2021-06-05 22:09:03,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:03,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:09:03,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:03,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:09:03,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:03,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:03,990 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 22:09:04,190 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 22:09:04,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784642609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:04,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:04,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:09:04,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787177451] [2021-06-05 22:09:04,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:09:04,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:09:04,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:04,191 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 22:09:05,338 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-06-05 22:09:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:05,404 INFO L93 Difference]: Finished difference Result 1118 states and 3569 transitions. [2021-06-05 22:09:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:09:05,404 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 22:09:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:05,406 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 22:09:05,406 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 22:09:05,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1071.6ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:09:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 22:09:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 721. [2021-06-05 22:09:05,413 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 22:09:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2366 transitions. [2021-06-05 22:09:05,414 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2366 transitions. Word has length 21 [2021-06-05 22:09:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:05,414 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2366 transitions. [2021-06-05 22:09:05,414 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 22:09:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2366 transitions. [2021-06-05 22:09:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:09:05,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:05,415 INFO L554 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 22:09:05,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7541,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:05,616 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1480674806, now seen corresponding path program 631 times [2021-06-05 22:09:05,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:05,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216312807] [2021-06-05 22:09:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:05,728 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 22:09:05,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:05,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216312807] [2021-06-05 22:09:05,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216312807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:05,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094822373] [2021-06-05 22:09:05,728 INFO 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 22:09:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:09:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,277 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 12 [2021-06-05 22:09:06,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,282 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 24 treesize of output 12 [2021-06-05 22:09:06,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:06,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,448 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 22:09:06,448 INFO L628 ElimStorePlain]: treesize reduction 173, result has 50.3 percent of original size [2021-06-05 22:09:06,451 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 22:09:06,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:09:06,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,555 INFO L628 ElimStorePlain]: treesize reduction 24, result has 83.4 percent of original size [2021-06-05 22:09:06,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:06,558 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 8 [2021-06-05 22:09:06,559 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:06,605 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 22:09:06,605 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:82 [2021-06-05 22:09:06,866 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 22:09:06,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094822373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:06,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:06,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:09:06,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796066788] [2021-06-05 22:09:06,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:06,867 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 22:09:07,174 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 22:09:07,376 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 22:09:07,562 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:09:07,761 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 22:09:07,965 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 22:09:08,132 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 22:09:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:08,227 INFO L93 Difference]: Finished difference Result 1233 states and 3826 transitions. [2021-06-05 22:09:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:08,228 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 22:09:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:08,229 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 22:09:08,229 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 22:09:08,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1425.0ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 22:09:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 748. [2021-06-05 22:09:08,237 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 22:09:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2481 transitions. [2021-06-05 22:09:08,238 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2481 transitions. Word has length 21 [2021-06-05 22:09:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:08,239 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2481 transitions. [2021-06-05 22:09:08,239 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 22:09:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2481 transitions. [2021-06-05 22:09:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:09:08,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:08,239 INFO L554 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 22:09:08,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7557,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:08,440 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:08,440 INFO L82 PathProgramCache]: Analyzing trace with hash -60787158, now seen corresponding path program 632 times [2021-06-05 22:09:08,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:08,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106557090] [2021-06-05 22:09:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:08,559 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 22:09:08,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:08,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106557090] [2021-06-05 22:09:08,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106557090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:08,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428837845] [2021-06-05 22:09:08,560 INFO L93 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 22:09:08,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:09:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:09,123 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_240, v_prenex_238], 1=[v_prenex_239, nondet_0]} [2021-06-05 22:09:09,127 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 5 treesize of output 3 [2021-06-05 22:09:09,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:09,256 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 22:09:09,256 INFO L628 ElimStorePlain]: treesize reduction 281, result has 32.6 percent of original size [2021-06-05 22:09:09,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:09,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:09,354 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 22:09:09,357 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 5 treesize of output 3 [2021-06-05 22:09:09,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:09,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:09,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:09,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:09,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:09,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:09,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:09,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:09,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:09,485 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 22:09:09,487 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 22:09:09,487 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 22:09:09,660 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 22:09:09,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428837845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:09,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:09,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:09:09,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032186519] [2021-06-05 22:09:09,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:09,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:09,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:09,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:09,661 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 22:09:09,956 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 22:09:11,143 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 22:09:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:11,305 INFO L93 Difference]: Finished difference Result 1339 states and 4052 transitions. [2021-06-05 22:09:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:09:11,306 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 22:09:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:11,307 INFO L225 Difference]: With dead ends: 1339 [2021-06-05 22:09:11,307 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 22:09:11,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1595.2ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:09:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 22:09:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 755. [2021-06-05 22:09:11,315 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 22:09:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2486 transitions. [2021-06-05 22:09:11,316 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2486 transitions. Word has length 21 [2021-06-05 22:09:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:11,316 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2486 transitions. [2021-06-05 22:09:11,316 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 22:09:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2486 transitions. [2021-06-05 22:09:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:09:11,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:11,317 INFO L554 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 22:09:11,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7617 [2021-06-05 22:09:11,518 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:11,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1908778506, now seen corresponding path program 633 times [2021-06-05 22:09:11,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:11,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219221448] [2021-06-05 22:09:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:11,652 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 22:09:11,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219221448] [2021-06-05 22:09:11,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219221448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905031335] [2021-06-05 22:09:11,653 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 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 22:09:11,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:11,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:09:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:11,971 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 11 treesize of output 7 [2021-06-05 22:09:11,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:11,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:11,976 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 18 treesize of output 12 [2021-06-05 22:09:11,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:11,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:11,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:11,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:09:11,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:12,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:12,002 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 22:09:12,203 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 22:09:12,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905031335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:12,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:12,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:09:12,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850860107] [2021-06-05 22:09:12,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:09:12,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:09:12,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:12,204 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 22:09:13,620 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 22:09:14,011 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 22:09:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:14,113 INFO L93 Difference]: Finished difference Result 1546 states and 4721 transitions. [2021-06-05 22:09:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:09:14,113 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 22:09:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:14,115 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 22:09:14,115 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 22:09:14,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1663.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:09:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 22:09:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 748. [2021-06-05 22:09:14,125 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 22:09:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2459 transitions. [2021-06-05 22:09:14,126 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2459 transitions. Word has length 21 [2021-06-05 22:09:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:14,126 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2459 transitions. [2021-06-05 22:09:14,126 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 22:09:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2459 transitions. [2021-06-05 22:09:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:09:14,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:14,127 INFO L554 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 22:09:14,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7675 [2021-06-05 22:09:14,327 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1427259128, now seen corresponding path program 634 times [2021-06-05 22:09:14,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:14,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835032538] [2021-06-05 22:09:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:14,449 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 22:09:14,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:14,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835032538] [2021-06-05 22:09:14,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835032538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:14,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343233057] [2021-06-05 22:09:14,450 INFO L93 rtionOrderModulation]: Changing 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 22:09:14,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:09:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:14,730 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 11 treesize of output 7 [2021-06-05 22:09:14,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:14,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:09:14,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:14,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:09:14,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:14,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:14,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:14,762 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 22:09:14,954 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 22:09:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343233057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:14,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:14,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:09:14,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125346208] [2021-06-05 22:09:14,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:09:14,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:09:14,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:14,954 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 22:09:16,225 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-05 22:09:16,541 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 22:09:17,253 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 22:09:17,648 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 22:09:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:17,766 INFO L93 Difference]: Finished difference Result 1789 states and 5418 transitions. [2021-06-05 22:09:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:09:17,767 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 22:09:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:17,769 INFO L225 Difference]: With dead ends: 1789 [2021-06-05 22:09:17,769 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 22:09:17,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2418.6ms TimeCoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:09:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 22:09:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 776. [2021-06-05 22:09:17,781 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 22:09:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2548 transitions. [2021-06-05 22:09:17,783 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2548 transitions. Word has length 21 [2021-06-05 22:09:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:17,783 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2548 transitions. [2021-06-05 22:09:17,783 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 22:09:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2548 transitions. [2021-06-05 22:09:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:17,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:17,784 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:17,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7694 [2021-06-05 22:09:17,984 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:17,984 INFO L82 PathProgramCache]: Analyzing trace with hash 459903069, now seen corresponding path program 635 times [2021-06-05 22:09:17,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:17,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951773725] [2021-06-05 22:09:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:18,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951773725] [2021-06-05 22:09:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951773725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050313637] [2021-06-05 22:09:18,046 INFO L93 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 22:09:18,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:18,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:18,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:18,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:18,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,250 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 13 treesize of output 9 [2021-06-05 22:09:18,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:18,265 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:18,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:18,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:18,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050313637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:18,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:18,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:09:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205518396] [2021-06-05 22:09:18,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:18,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:18,311 INFO L87 Difference]: Start difference. First operand 776 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:09:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:18,649 INFO L93 Difference]: Finished difference Result 1186 states and 3742 transitions. [2021-06-05 22:09:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:18,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:09:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:18,651 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 22:09:18,651 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 22:09:18,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 22:09:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 773. [2021-06-05 22:09:18,659 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 22:09:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2550 transitions. [2021-06-05 22:09:18,660 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2550 transitions. Word has length 22 [2021-06-05 22:09:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:18,661 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2550 transitions. [2021-06-05 22:09:18,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:09:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2550 transitions. [2021-06-05 22:09:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:18,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:18,661 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:18,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7706,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:18,862 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1760651138, now seen corresponding path program 636 times [2021-06-05 22:09:18,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:18,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464928897] [2021-06-05 22:09:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:18,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:18,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464928897] [2021-06-05 22:09:18,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464928897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:18,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627718444] [2021-06-05 22:09:18,968 INFO L93 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 22:09:19,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:19,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:19,315 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_242, v_prenex_246], 1=[v_prenex_243, nondet_0]} [2021-06-05 22:09:19,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:19,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,369 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-06-05 22:09:19,372 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 5 treesize of output 3 [2021-06-05 22:09:19,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:19,393 INFO L518 ElimStorePlain]: Eliminatee v_prenex_243 vanished before elimination [2021-06-05 22:09:19,395 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 5 treesize of output 3 [2021-06-05 22:09:19,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:19,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:19,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:19,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:19,418 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 22:09:19,418 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-06-05 22:09:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:19,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627718444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:19,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:19,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:19,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521269297] [2021-06-05 22:09:19,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:19,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:19,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:19,471 INFO L87 Difference]: Start difference. First operand 773 states and 2550 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 22:09:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:20,202 INFO L93 Difference]: Finished difference Result 1181 states and 3688 transitions. [2021-06-05 22:09:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:20,202 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 22:09:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:20,203 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 22:09:20,203 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 22:09:20,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 639.7ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 22:09:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 795. [2021-06-05 22:09:20,212 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 22:09:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2605 transitions. [2021-06-05 22:09:20,213 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2605 transitions. Word has length 22 [2021-06-05 22:09:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:20,214 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2605 transitions. [2021-06-05 22:09:20,214 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 22:09:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2605 transitions. [2021-06-05 22:09:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:20,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:20,214 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:20,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7710,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:20,415 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -602007608, now seen corresponding path program 637 times [2021-06-05 22:09:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:20,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826768260] [2021-06-05 22:09:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:20,514 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 22:09:20,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:20,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826768260] [2021-06-05 22:09:20,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826768260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:20,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764435942] [2021-06-05 22:09:20,515 INFO 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 22:09:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:20,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:20,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:20,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:20,855 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 15 treesize of output 1 [2021-06-05 22:09:20,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,872 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:09:20,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:20,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:20,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:20,881 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 22:09:20,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:09:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:20,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764435942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:20,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:20,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:20,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484455740] [2021-06-05 22:09:20,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:20,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:20,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:20,938 INFO L87 Difference]: Start difference. First operand 795 states and 2605 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 22:09:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:21,563 INFO L93 Difference]: Finished difference Result 1233 states and 3809 transitions. [2021-06-05 22:09:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:21,563 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 22:09:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:21,564 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 22:09:21,564 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 22:09:21,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 22:09:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 798. [2021-06-05 22:09:21,574 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 22:09:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2616 transitions. [2021-06-05 22:09:21,575 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2616 transitions. Word has length 22 [2021-06-05 22:09:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:21,575 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2616 transitions. [2021-06-05 22:09:21,575 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 22:09:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2616 transitions. [2021-06-05 22:09:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:21,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:21,576 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:21,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7725,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:21,776 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2095915330, now seen corresponding path program 638 times [2021-06-05 22:09:21,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:21,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939176653] [2021-06-05 22:09:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:21,874 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 22:09:21,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:21,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939176653] [2021-06-05 22:09:21,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939176653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:21,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523421791] [2021-06-05 22:09:21,875 INFO L93 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 22:09:22,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:22,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:22,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:22,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:22,233 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:09:22,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:22,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:22,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:22,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:22,242 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 22:09:22,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:09:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:22,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523421791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:22,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:22,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:22,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215887469] [2021-06-05 22:09:22,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:22,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:22,297 INFO L87 Difference]: Start difference. First operand 798 states and 2616 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 22:09:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:23,093 INFO L93 Difference]: Finished difference Result 1190 states and 3706 transitions. [2021-06-05 22:09:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:23,093 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 22:09:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:23,095 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 22:09:23,095 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 22:09:23,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 22:09:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 790. [2021-06-05 22:09:23,104 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 22:09:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2592 transitions. [2021-06-05 22:09:23,105 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2592 transitions. Word has length 22 [2021-06-05 22:09:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:23,105 INFO L482 AbstractCegarLoop]: Abstraction has 790 states and 2592 transitions. [2021-06-05 22:09:23,106 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 22:09:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2592 transitions. [2021-06-05 22:09:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:23,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:23,107 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:23,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7747,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:23,307 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash 492083980, now seen corresponding path program 639 times [2021-06-05 22:09:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:23,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560381133] [2021-06-05 22:09:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:23,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560381133] [2021-06-05 22:09:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560381133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417162577] [2021-06-05 22:09:23,446 INFO L93 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 22:09:23,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:23,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417162577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:23,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:23,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:23,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542909523] [2021-06-05 22:09:23,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:23,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:23,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:23,889 INFO L87 Difference]: Start difference. First operand 790 states and 2592 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 22:09:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:24,694 INFO L93 Difference]: Finished difference Result 1167 states and 3629 transitions. [2021-06-05 22:09:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:24,695 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 22:09:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:24,696 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 22:09:24,696 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 22:09:24,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 22:09:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 796. [2021-06-05 22:09:24,705 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 22:09:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2614 transitions. [2021-06-05 22:09:24,707 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2614 transitions. Word has length 22 [2021-06-05 22:09:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:24,707 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2614 transitions. [2021-06-05 22:09:24,707 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 22:09:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2614 transitions. [2021-06-05 22:09:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:24,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:24,708 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:24,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7764 [2021-06-05 22:09:24,908 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1001823742, now seen corresponding path program 640 times [2021-06-05 22:09:24,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:24,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418361877] [2021-06-05 22:09:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:25,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418361877] [2021-06-05 22:09:25,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418361877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426098763] [2021-06-05 22:09:25,024 INFO L93 rtionOrderModulation]: Changing 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 22:09:25,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:25,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:25,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:25,524 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 22:09:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426098763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:25,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:25,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519247997] [2021-06-05 22:09:25,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:25,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:25,525 INFO L87 Difference]: Start difference. First operand 796 states and 2614 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 22:09:26,129 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-06-05 22:09:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:26,372 INFO L93 Difference]: Finished difference Result 1173 states and 3636 transitions. [2021-06-05 22:09:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:26,373 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 22:09:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:26,374 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 22:09:26,374 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 22:09:26,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 884.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 22:09:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 793. [2021-06-05 22:09:26,383 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 22:09:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2603 transitions. [2021-06-05 22:09:26,384 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2603 transitions. Word has length 22 [2021-06-05 22:09:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:26,384 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2603 transitions. [2021-06-05 22:09:26,384 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 22:09:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2603 transitions. [2021-06-05 22:09:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:26,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:26,385 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:26,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7779,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:26,586 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash -463968164, now seen corresponding path program 641 times [2021-06-05 22:09:26,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:26,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248233380] [2021-06-05 22:09:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:26,713 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 22:09:26,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:26,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248233380] [2021-06-05 22:09:26,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248233380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:26,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315857936] [2021-06-05 22:09:26,713 INFO L93 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 22:09:26,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:27,160 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 22:09:27,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315857936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:27,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:27,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:27,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686874993] [2021-06-05 22:09:27,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:27,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:27,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:27,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:27,160 INFO L87 Difference]: Start difference. First operand 793 states and 2603 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 22:09:27,839 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-06-05 22:09:28,015 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2021-06-05 22:09:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:28,102 INFO L93 Difference]: Finished difference Result 1131 states and 3541 transitions. [2021-06-05 22:09:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:28,102 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 22:09:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:28,104 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 22:09:28,104 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 22:09:28,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 929.3ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 22:09:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-06-05 22:09:28,112 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 22:09:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2600 transitions. [2021-06-05 22:09:28,113 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2600 transitions. Word has length 22 [2021-06-05 22:09:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:28,113 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2600 transitions. [2021-06-05 22:09:28,114 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 22:09:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2600 transitions. [2021-06-05 22:09:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:28,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:28,114 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:28,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7796 [2021-06-05 22:09:28,315 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash 49184840, now seen corresponding path program 642 times [2021-06-05 22:09:28,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:28,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550357505] [2021-06-05 22:09:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:28,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550357505] [2021-06-05 22:09:28,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550357505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:28,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863865312] [2021-06-05 22:09:28,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:28,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:28,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:28,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863865312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:28,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:28,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:28,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555370805] [2021-06-05 22:09:28,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:28,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:28,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:28,927 INFO L87 Difference]: Start difference. First operand 793 states and 2600 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 22:09:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:29,710 INFO L93 Difference]: Finished difference Result 1164 states and 3618 transitions. [2021-06-05 22:09:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:29,711 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 22:09:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:29,712 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 22:09:29,712 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 22:09:29,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 22:09:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 802. [2021-06-05 22:09:29,721 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 22:09:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2633 transitions. [2021-06-05 22:09:29,723 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2633 transitions. Word has length 22 [2021-06-05 22:09:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:29,723 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2633 transitions. [2021-06-05 22:09:29,723 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 22:09:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2633 transitions. [2021-06-05 22:09:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:29,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:29,724 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:29,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7815,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:29,924 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1444722882, now seen corresponding path program 643 times [2021-06-05 22:09:29,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:29,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684689017] [2021-06-05 22:09:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:30,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:30,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684689017] [2021-06-05 22:09:30,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684689017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:30,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580821582] [2021-06-05 22:09:30,041 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 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 22:09:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:30,529 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 22:09:30,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580821582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:30,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:30,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:30,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627464472] [2021-06-05 22:09:30,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:30,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:30,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:30,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:30,530 INFO L87 Difference]: Start difference. First operand 802 states and 2633 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 22:09:31,070 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 22:09:31,247 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-06-05 22:09:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:31,496 INFO L93 Difference]: Finished difference Result 1170 states and 3625 transitions. [2021-06-05 22:09:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:31,496 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 22:09:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:31,497 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 22:09:31,498 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 22:09:31,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 977.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 22:09:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 799. [2021-06-05 22:09:31,506 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 22:09:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2622 transitions. [2021-06-05 22:09:31,508 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2622 transitions. Word has length 22 [2021-06-05 22:09:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:31,508 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2622 transitions. [2021-06-05 22:09:31,508 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 22:09:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2622 transitions. [2021-06-05 22:09:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:31,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:31,509 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:31,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7831,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:31,709 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash -906867304, now seen corresponding path program 644 times [2021-06-05 22:09:31,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:31,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144221503] [2021-06-05 22:09:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:31,836 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 22:09:31,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:31,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144221503] [2021-06-05 22:09:31,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144221503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:31,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351972917] [2021-06-05 22:09:31,837 INFO L93 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 22:09:31,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:31,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:31,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:32,298 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 22:09:32,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351972917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:32,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:32,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:32,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40667994] [2021-06-05 22:09:32,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:32,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:32,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:32,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:32,299 INFO L87 Difference]: Start difference. First operand 799 states and 2622 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 22:09:32,869 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 22:09:33,059 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-06-05 22:09:33,237 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-06-05 22:09:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:33,341 INFO L93 Difference]: Finished difference Result 1134 states and 3543 transitions. [2021-06-05 22:09:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:33,341 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 22:09:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:33,343 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 22:09:33,343 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 22:09:33,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 22:09:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 796. [2021-06-05 22:09:33,351 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 22:09:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2611 transitions. [2021-06-05 22:09:33,352 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2611 transitions. Word has length 22 [2021-06-05 22:09:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:33,352 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2611 transitions. [2021-06-05 22:09:33,352 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 22:09:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2611 transitions. [2021-06-05 22:09:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:33,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:33,353 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:33,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7849 [2021-06-05 22:09:33,554 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:33,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:33,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1413213570, now seen corresponding path program 645 times [2021-06-05 22:09:33,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:33,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97657398] [2021-06-05 22:09:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:33,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:33,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97657398] [2021-06-05 22:09:33,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97657398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:33,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883657563] [2021-06-05 22:09:33,655 INFO L93 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 22:09:33,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:33,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:33,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:34,108 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 22:09:34,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883657563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:34,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:34,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11262531] [2021-06-05 22:09:34,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:34,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:34,108 INFO L87 Difference]: Start difference. First operand 796 states and 2611 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 22:09:34,675 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 22:09:34,860 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 22:09:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:35,102 INFO L93 Difference]: Finished difference Result 1125 states and 3519 transitions. [2021-06-05 22:09:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:35,103 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 22:09:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:35,104 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 22:09:35,104 INFO L226 Difference]: Without dead ends: 1107 [2021-06-05 22:09:35,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 997.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-06-05 22:09:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 796. [2021-06-05 22:09:35,114 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 22:09:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2608 transitions. [2021-06-05 22:09:35,116 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2608 transitions. Word has length 22 [2021-06-05 22:09:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:35,116 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2608 transitions. [2021-06-05 22:09:35,116 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 22:09:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2608 transitions. [2021-06-05 22:09:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:35,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:35,117 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:35,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7863 [2021-06-05 22:09:35,317 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1640758064, now seen corresponding path program 646 times [2021-06-05 22:09:35,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:35,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433501984] [2021-06-05 22:09:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:35,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433501984] [2021-06-05 22:09:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433501984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153042258] [2021-06-05 22:09:35,430 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 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 22:09:35,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153042258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:35,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:35,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:35,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451234694] [2021-06-05 22:09:35,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:35,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:35,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:35,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:35,906 INFO L87 Difference]: Start difference. First operand 796 states and 2608 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 22:09:36,282 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 22:09:36,453 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 22:09:36,637 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 22:09:36,799 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 22:09:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:36,961 INFO L93 Difference]: Finished difference Result 1221 states and 3760 transitions. [2021-06-05 22:09:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:36,962 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 22:09:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:36,963 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 22:09:36,963 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 22:09:36,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1109.8ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 22:09:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 808. [2021-06-05 22:09:36,973 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 22:09:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2652 transitions. [2021-06-05 22:09:36,974 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2652 transitions. Word has length 22 [2021-06-05 22:09:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:36,974 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2652 transitions. [2021-06-05 22:09:36,975 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 22:09:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2652 transitions. [2021-06-05 22:09:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:36,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:36,975 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:37,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7882,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:37,176 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1160301510, now seen corresponding path program 647 times [2021-06-05 22:09:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:37,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866779387] [2021-06-05 22:09:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:37,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866779387] [2021-06-05 22:09:37,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866779387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488107046] [2021-06-05 22:09:37,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:37,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:37,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:37,782 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 22:09:37,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488107046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:37,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:37,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:37,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460061829] [2021-06-05 22:09:37,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:37,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:37,783 INFO L87 Difference]: Start difference. First operand 808 states and 2652 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 22:09:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:38,727 INFO L93 Difference]: Finished difference Result 1227 states and 3767 transitions. [2021-06-05 22:09:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:38,727 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 22:09:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:38,729 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 22:09:38,729 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 22:09:38,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 955.0ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 22:09:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 805. [2021-06-05 22:09:38,747 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 22:09:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2641 transitions. [2021-06-05 22:09:38,748 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2641 transitions. Word has length 22 [2021-06-05 22:09:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:38,748 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2641 transitions. [2021-06-05 22:09:38,749 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 22:09:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2641 transitions. [2021-06-05 22:09:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:38,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:38,750 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:38,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7897,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:38,950 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1698157088, now seen corresponding path program 648 times [2021-06-05 22:09:38,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:38,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918931464] [2021-06-05 22:09:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:39,080 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 22:09:39,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:39,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918931464] [2021-06-05 22:09:39,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918931464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:39,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764190708] [2021-06-05 22:09:39,080 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 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 22:09:39,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:39,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:39,546 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 22:09:39,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764190708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:39,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:39,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:39,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670111159] [2021-06-05 22:09:39,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:39,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:39,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:39,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:39,547 INFO L87 Difference]: Start difference. First operand 805 states and 2641 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 22:09:40,226 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 22:09:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:40,502 INFO L93 Difference]: Finished difference Result 1191 states and 3685 transitions. [2021-06-05 22:09:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:40,503 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 22:09:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:40,504 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 22:09:40,504 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 22:09:40,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 22:09:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 802. [2021-06-05 22:09:40,513 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 22:09:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2630 transitions. [2021-06-05 22:09:40,514 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2630 transitions. Word has length 22 [2021-06-05 22:09:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:40,514 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2630 transitions. [2021-06-05 22:09:40,514 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 22:09:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2630 transitions. [2021-06-05 22:09:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:40,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:40,515 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:40,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7911,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:40,716 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1191810822, now seen corresponding path program 649 times [2021-06-05 22:09:40,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:40,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630550074] [2021-06-05 22:09:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:40,819 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 22:09:40,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630550074] [2021-06-05 22:09:40,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630550074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234829598] [2021-06-05 22:09:40,819 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 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 22:09:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:40,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:41,323 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 22:09:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234829598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:41,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:41,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:41,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444697208] [2021-06-05 22:09:41,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:41,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:41,324 INFO L87 Difference]: Start difference. First operand 802 states and 2630 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 22:09:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:42,248 INFO L93 Difference]: Finished difference Result 1188 states and 3674 transitions. [2021-06-05 22:09:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:42,249 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 22:09:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:42,250 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 22:09:42,250 INFO L226 Difference]: Without dead ends: 1170 [2021-06-05 22:09:42,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 931.6ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-06-05 22:09:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 799. [2021-06-05 22:09:42,259 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 22:09:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2619 transitions. [2021-06-05 22:09:42,260 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2619 transitions. Word has length 22 [2021-06-05 22:09:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:42,260 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2619 transitions. [2021-06-05 22:09:42,260 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 22:09:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2619 transitions. [2021-06-05 22:09:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:42,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:42,261 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:42,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7925,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:42,461 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2062920676, now seen corresponding path program 650 times [2021-06-05 22:09:42,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:42,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96885762] [2021-06-05 22:09:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:42,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96885762] [2021-06-05 22:09:42,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96885762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055226772] [2021-06-05 22:09:42,561 INFO L93 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 22:09:42,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:42,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:42,980 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 22:09:42,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055226772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:42,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:42,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:42,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546046646] [2021-06-05 22:09:42,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:42,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:42,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:42,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:42,981 INFO L87 Difference]: Start difference. First operand 799 states and 2619 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 22:09:43,422 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 22:09:43,592 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-05 22:09:43,762 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 22:09:43,921 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-05 22:09:44,074 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 22:09:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:44,098 INFO L93 Difference]: Finished difference Result 1179 states and 3650 transitions. [2021-06-05 22:09:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:44,099 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 22:09:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:44,100 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 22:09:44,100 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 22:09:44,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1067.5ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:44,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 22:09:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 799. [2021-06-05 22:09:44,109 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 22:09:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2616 transitions. [2021-06-05 22:09:44,110 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2616 transitions. Word has length 22 [2021-06-05 22:09:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:44,110 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2616 transitions. [2021-06-05 22:09:44,110 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 22:09:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2616 transitions. [2021-06-05 22:09:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:44,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:44,111 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:44,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7943,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:44,311 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash -160456771, now seen corresponding path program 651 times [2021-06-05 22:09:44,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:44,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110399775] [2021-06-05 22:09:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:44,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:44,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110399775] [2021-06-05 22:09:44,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110399775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:44,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531867528] [2021-06-05 22:09:44,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:09:44,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:44,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:44,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:44,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:44,589 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 22:09:44,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:44,591 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 22:09:44,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:44,614 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:44,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:44,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:44,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531867528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:44,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:44,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:09:44,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994004361] [2021-06-05 22:09:44,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:44,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:44,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:44,660 INFO L87 Difference]: Start difference. First operand 799 states and 2616 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:09:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:45,045 INFO L93 Difference]: Finished difference Result 1201 states and 3799 transitions. [2021-06-05 22:09:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:45,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:09:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:45,047 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 22:09:45,047 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 22:09:45,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 22:09:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 806. [2021-06-05 22:09:45,055 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 22:09:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-06-05 22:09:45,056 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-06-05 22:09:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:45,056 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-06-05 22:09:45,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:09:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-06-05 22:09:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:45,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:45,057 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:45,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7962 [2021-06-05 22:09:45,258 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash -813534024, now seen corresponding path program 652 times [2021-06-05 22:09:45,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:45,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537113277] [2021-06-05 22:09:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:45,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537113277] [2021-06-05 22:09:45,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537113277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346953351] [2021-06-05 22:09:45,376 INFO L93 rtionOrderModulation]: Changing 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 22:09:45,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:45,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:45,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:45,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:45,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:45,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:45,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:45,748 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 22:09:45,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,751 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 5 treesize of output 3 [2021-06-05 22:09:45,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:45,767 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 22:09:45,767 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 22:09:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:45,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346953351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:45,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:45,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:45,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467667352] [2021-06-05 22:09:45,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:45,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:45,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:45,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:45,822 INFO L87 Difference]: Start difference. First operand 806 states and 2645 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 22:09:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:46,625 INFO L93 Difference]: Finished difference Result 1256 states and 3898 transitions. [2021-06-05 22:09:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:46,626 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 22:09:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:46,627 INFO L225 Difference]: With dead ends: 1256 [2021-06-05 22:09:46,627 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 22:09:46,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 685.6ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 22:09:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 821. [2021-06-05 22:09:46,637 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 22:09:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2684 transitions. [2021-06-05 22:09:46,638 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2684 transitions. Word has length 22 [2021-06-05 22:09:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:46,638 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2684 transitions. [2021-06-05 22:09:46,638 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 22:09:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2684 transitions. [2021-06-05 22:09:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:46,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:46,639 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:46,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7967,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:46,840 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash 345109506, now seen corresponding path program 653 times [2021-06-05 22:09:46,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:46,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037754532] [2021-06-05 22:09:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:46,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037754532] [2021-06-05 22:09:46,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037754532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569101788] [2021-06-05 22:09:46,948 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 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 22:09:47,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:47,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:47,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:47,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,313 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 21 treesize of output 1 [2021-06-05 22:09:47,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:47,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:47,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:47,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,336 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 5 treesize of output 3 [2021-06-05 22:09:47,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:47,352 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 22:09:47,352 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 22:09:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569101788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:47,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223494579] [2021-06-05 22:09:47,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:47,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:47,413 INFO L87 Difference]: Start difference. First operand 821 states and 2684 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 22:09:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:48,199 INFO L93 Difference]: Finished difference Result 1308 states and 4019 transitions. [2021-06-05 22:09:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:48,200 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 22:09:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:48,201 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 22:09:48,201 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 22:09:48,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 22:09:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 824. [2021-06-05 22:09:48,211 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 22:09:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2695 transitions. [2021-06-05 22:09:48,212 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2695 transitions. Word has length 22 [2021-06-05 22:09:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:48,212 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2695 transitions. [2021-06-05 22:09:48,212 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 22:09:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2695 transitions. [2021-06-05 22:09:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:48,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:48,213 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:48,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7984 [2021-06-05 22:09:48,414 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:48,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:48,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1148798216, now seen corresponding path program 654 times [2021-06-05 22:09:48,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:48,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897932108] [2021-06-05 22:09:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:48,520 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 22:09:48,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897932108] [2021-06-05 22:09:48,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897932108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118913660] [2021-06-05 22:09:48,520 INFO L93 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 22:09:48,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:48,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:48,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:48,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 22:09:48,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:48,884 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 6 treesize of output 4 [2021-06-05 22:09:48,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:48,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:48,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:09:48,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:48,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:48,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:09:48,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:48,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:48,921 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 22:09:48,922 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 22:09:48,977 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 22:09:48,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118913660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:48,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:48,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:48,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740497815] [2021-06-05 22:09:48,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:48,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:48,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:48,978 INFO L87 Difference]: Start difference. First operand 824 states and 2695 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 22:09:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:49,757 INFO L93 Difference]: Finished difference Result 1265 states and 3916 transitions. [2021-06-05 22:09:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:49,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:09:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:49,759 INFO L225 Difference]: With dead ends: 1265 [2021-06-05 22:09:49,759 INFO L226 Difference]: Without dead ends: 1259 [2021-06-05 22:09:49,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-05 22:09:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 816. [2021-06-05 22:09:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.2773006134969327) internal successors, (2671), 815 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2671 transitions. [2021-06-05 22:09:49,769 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2671 transitions. Word has length 22 [2021-06-05 22:09:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:49,769 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2671 transitions. [2021-06-05 22:09:49,769 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 22:09:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2671 transitions. [2021-06-05 22:09:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:49,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:49,770 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:49,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8002 [2021-06-05 22:09:49,971 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:49,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1439201094, now seen corresponding path program 655 times [2021-06-05 22:09:49,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:49,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299180714] [2021-06-05 22:09:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:50,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:50,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299180714] [2021-06-05 22:09:50,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299180714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:50,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622572289] [2021-06-05 22:09:50,097 INFO 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 22:09:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622572289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:50,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:50,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:50,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861252957] [2021-06-05 22:09:50,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:50,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:50,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:50,576 INFO L87 Difference]: Start difference. First operand 816 states and 2671 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 22:09:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:51,434 INFO L93 Difference]: Finished difference Result 1208 states and 3751 transitions. [2021-06-05 22:09:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:51,434 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 22:09:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:51,436 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 22:09:51,436 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 22:09:51,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 819.9ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 22:09:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 822. [2021-06-05 22:09:51,445 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 22:09:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2693 transitions. [2021-06-05 22:09:51,446 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2693 transitions. Word has length 22 [2021-06-05 22:09:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:51,446 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2693 transitions. [2021-06-05 22:09:51,446 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 22:09:51,446 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2693 transitions. [2021-06-05 22:09:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:51,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:51,447 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:51,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8020 [2021-06-05 22:09:51,648 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash -54706628, now seen corresponding path program 656 times [2021-06-05 22:09:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:51,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211970850] [2021-06-05 22:09:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:51,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211970850] [2021-06-05 22:09:51,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211970850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569578783] [2021-06-05 22:09:51,771 INFO L93 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 22:09:51,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:51,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:51,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:51,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:52,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569578783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:52,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:52,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:52,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021486605] [2021-06-05 22:09:52,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:52,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:52,243 INFO L87 Difference]: Start difference. First operand 822 states and 2693 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 22:09:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:53,070 INFO L93 Difference]: Finished difference Result 1214 states and 3758 transitions. [2021-06-05 22:09:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:53,071 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 22:09:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:53,072 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 22:09:53,072 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 22:09:53,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 22:09:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 819. [2021-06-05 22:09:53,081 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 22:09:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2682 transitions. [2021-06-05 22:09:53,082 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2682 transitions. Word has length 22 [2021-06-05 22:09:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:53,082 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2682 transitions. [2021-06-05 22:09:53,082 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 22:09:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2682 transitions. [2021-06-05 22:09:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:53,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:53,083 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:53,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8032,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:53,284 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 483148950, now seen corresponding path program 657 times [2021-06-05 22:09:53,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:53,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964753854] [2021-06-05 22:09:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:53,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:53,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964753854] [2021-06-05 22:09:53,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964753854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:53,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582856767] [2021-06-05 22:09:53,419 INFO L93 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 22:09:53,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:53,888 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 22:09:53,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582856767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:53,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:53,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:53,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476484547] [2021-06-05 22:09:53,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:53,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:53,889 INFO L87 Difference]: Start difference. First operand 819 states and 2682 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 22:09:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:54,756 INFO L93 Difference]: Finished difference Result 1172 states and 3663 transitions. [2021-06-05 22:09:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:54,756 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 22:09:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:54,758 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 22:09:54,758 INFO L226 Difference]: Without dead ends: 1160 [2021-06-05 22:09:54,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 851.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-05 22:09:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 811. [2021-06-05 22:09:54,767 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 22:09:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2658 transitions. [2021-06-05 22:09:54,768 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2658 transitions. Word has length 22 [2021-06-05 22:09:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:54,768 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2658 transitions. [2021-06-05 22:09:54,768 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 22:09:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2658 transitions. [2021-06-05 22:09:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:54,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:54,769 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:54,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8050,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:54,970 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:54,970 INFO L82 PathProgramCache]: Analyzing trace with hash 996301954, now seen corresponding path program 658 times [2021-06-05 22:09:54,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:54,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730509306] [2021-06-05 22:09:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:55,089 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 22:09:55,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:55,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730509306] [2021-06-05 22:09:55,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730509306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:55,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666471812] [2021-06-05 22:09:55,089 INFO L93 rtionOrderModulation]: Changing 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 22:09:55,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:55,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:55,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666471812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:55,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:55,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:55,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033447617] [2021-06-05 22:09:55,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:55,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:55,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:55,623 INFO L87 Difference]: Start difference. First operand 811 states and 2658 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 22:09:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:56,474 INFO L93 Difference]: Finished difference Result 1197 states and 3719 transitions. [2021-06-05 22:09:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:56,474 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 22:09:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:56,476 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 22:09:56,476 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 22:09:56,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 22:09:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 820. [2021-06-05 22:09:56,484 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 22:09:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2691 transitions. [2021-06-05 22:09:56,486 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2691 transitions. Word has length 22 [2021-06-05 22:09:56,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:56,486 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2691 transitions. [2021-06-05 22:09:56,486 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 22:09:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2691 transitions. [2021-06-05 22:09:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:56,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:56,487 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:56,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8065 [2021-06-05 22:09:56,687 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash -497605768, now seen corresponding path program 659 times [2021-06-05 22:09:56,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:56,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651301699] [2021-06-05 22:09:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:56,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:56,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651301699] [2021-06-05 22:09:56,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651301699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:56,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988273508] [2021-06-05 22:09:56,804 INFO L93 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 22:09:56,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:56,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:57,308 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 22:09:57,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988273508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:57,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:57,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:57,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703504134] [2021-06-05 22:09:57,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:57,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:57,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:57,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:57,309 INFO L87 Difference]: Start difference. First operand 820 states and 2691 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 22:09:57,894 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2021-06-05 22:09:58,039 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 22:09:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:58,255 INFO L93 Difference]: Finished difference Result 1203 states and 3726 transitions. [2021-06-05 22:09:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:58,256 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 22:09:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:58,257 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 22:09:58,257 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 22:09:58,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 935.4ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 22:09:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 817. [2021-06-05 22:09:58,266 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 22:09:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2680 transitions. [2021-06-05 22:09:58,268 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2680 transitions. Word has length 22 [2021-06-05 22:09:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:58,268 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2680 transitions. [2021-06-05 22:09:58,268 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 22:09:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2680 transitions. [2021-06-05 22:09:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:58,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:58,269 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:58,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8078,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:58,469 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash 40249810, now seen corresponding path program 660 times [2021-06-05 22:09:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:58,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518653568] [2021-06-05 22:09:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:58,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:58,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518653568] [2021-06-05 22:09:58,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518653568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:58,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705713088] [2021-06-05 22:09:58,594 INFO L93 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 22:09:58,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:58,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:09:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:59,085 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 22:09:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705713088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:59,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:59,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:09:59,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303833205] [2021-06-05 22:09:59,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:59,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:59,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:59,085 INFO L87 Difference]: Start difference. First operand 817 states and 2680 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 22:09:59,612 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 22:09:59,903 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-05 22:09:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:59,987 INFO L93 Difference]: Finished difference Result 1167 states and 3644 transitions. [2021-06-05 22:09:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:59,987 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 22:09:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:59,989 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 22:09:59,989 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 22:09:59,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 924.8ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 22:09:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 814. [2021-06-05 22:09:59,997 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 22:09:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2669 transitions. [2021-06-05 22:09:59,998 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2669 transitions. Word has length 22 [2021-06-05 22:09:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:59,998 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2669 transitions. [2021-06-05 22:09:59,998 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 22:09:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2669 transitions. [2021-06-05 22:09:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:09:59,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:59,999 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:00,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8091 [2021-06-05 22:10:00,200 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash -466096456, now seen corresponding path program 661 times [2021-06-05 22:10:00,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:00,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204357895] [2021-06-05 22:10:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:00,308 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 22:10:00,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:00,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204357895] [2021-06-05 22:10:00,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204357895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:00,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014246695] [2021-06-05 22:10:00,309 INFO 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 22:10:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:00,793 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 22:10:00,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014246695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:00,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:00,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:00,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755095242] [2021-06-05 22:10:00,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:00,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:00,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:00,794 INFO L87 Difference]: Start difference. First operand 814 states and 2669 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 22:10:01,391 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 22:10:01,585 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2021-06-05 22:10:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:01,766 INFO L93 Difference]: Finished difference Result 1158 states and 3620 transitions. [2021-06-05 22:10:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:01,767 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 22:10:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:01,768 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 22:10:01,768 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 22:10:01,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 971.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 22:10:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 806. [2021-06-05 22:10:01,777 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 22:10:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-06-05 22:10:01,778 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-06-05 22:10:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:01,778 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-06-05 22:10:01,778 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 22:10:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-06-05 22:10:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:01,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:01,779 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:01,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8108,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:01,980 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:01,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1856475997, now seen corresponding path program 662 times [2021-06-05 22:10:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:01,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961986059] [2021-06-05 22:10:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:02,059 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 22:10:02,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961986059] [2021-06-05 22:10:02,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961986059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208426275] [2021-06-05 22:10:02,060 INFO L93 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 22:10:02,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:02,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:02,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:02,275 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 12 treesize of output 8 [2021-06-05 22:10:02,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:02,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:02,292 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:10:02,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:02,292 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:10:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:02,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208426275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:02,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:02,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:10:02,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356446480] [2021-06-05 22:10:02,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:10:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:10:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:02,339 INFO L87 Difference]: Start difference. First operand 806 states and 2645 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:10:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:02,757 INFO L93 Difference]: Finished difference Result 1193 states and 3775 transitions. [2021-06-05 22:10:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:10:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:02,759 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 22:10:02,759 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:10:02,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:10:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:10:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 813. [2021-06-05 22:10:02,768 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 22:10:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 22:10:02,769 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 22:10:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:02,769 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 22:10:02,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:10:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 22:10:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:02,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:02,770 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:02,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8130 [2021-06-05 22:10:02,971 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1212632318, now seen corresponding path program 663 times [2021-06-05 22:10:02,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:02,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511633486] [2021-06-05 22:10:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:03,109 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 22:10:03,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:03,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511633486] [2021-06-05 22:10:03,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511633486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:03,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762433891] [2021-06-05 22:10:03,110 INFO L93 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 22:10:03,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:03,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:03,486 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 15 treesize of output 1 [2021-06-05 22:10:03,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:03,503 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:10:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:03,505 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 12 treesize of output 8 [2021-06-05 22:10:03,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:03,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:03,512 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 22:10:03,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:10:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762433891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:03,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:03,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:03,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983170521] [2021-06-05 22:10:03,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:03,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:03,567 INFO L87 Difference]: Start difference. First operand 813 states and 2674 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 22:10:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:04,363 INFO L93 Difference]: Finished difference Result 1258 states and 3914 transitions. [2021-06-05 22:10:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:04,363 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 22:10:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:04,365 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 22:10:04,365 INFO L226 Difference]: Without dead ends: 1258 [2021-06-05 22:10:04,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-05 22:10:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 823. [2021-06-05 22:10:04,374 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 22:10:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2700 transitions. [2021-06-05 22:10:04,375 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2700 transitions. Word has length 22 [2021-06-05 22:10:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:04,375 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2700 transitions. [2021-06-05 22:10:04,375 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 22:10:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2700 transitions. [2021-06-05 22:10:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:04,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:04,377 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:04,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8135,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:04,588 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash -53988788, now seen corresponding path program 664 times [2021-06-05 22:10:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:04,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781195555] [2021-06-05 22:10:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:04,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:04,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781195555] [2021-06-05 22:10:04,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781195555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:04,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723220970] [2021-06-05 22:10:04,731 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 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 22:10:04,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:04,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:05,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 22:10:05,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,135 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:10:05,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:05,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:10:05,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:05,143 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 22:10:05,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:10:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:05,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723220970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:05,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:05,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:05,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864297020] [2021-06-05 22:10:05,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:05,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:05,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:05,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:05,200 INFO L87 Difference]: Start difference. First operand 823 states and 2700 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 22:10:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:05,960 INFO L93 Difference]: Finished difference Result 1310 states and 4035 transitions. [2021-06-05 22:10:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:05,960 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 22:10:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:05,962 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 22:10:05,962 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 22:10:05,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 22:10:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 826. [2021-06-05 22:10:05,972 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 22:10:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2711 transitions. [2021-06-05 22:10:05,973 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2711 transitions. Word has length 22 [2021-06-05 22:10:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:05,973 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2711 transitions. [2021-06-05 22:10:05,973 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 22:10:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2711 transitions. [2021-06-05 22:10:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:05,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:05,974 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:06,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8155 [2021-06-05 22:10:06,175 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:06,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1547896510, now seen corresponding path program 665 times [2021-06-05 22:10:06,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:06,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674443617] [2021-06-05 22:10:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:06,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674443617] [2021-06-05 22:10:06,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674443617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739267488] [2021-06-05 22:10:06,304 INFO L93 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 22:10:06,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:06,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:06,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:06,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:10:06,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:06,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,700 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 22:10:06,700 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-05 22:10:06,701 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 22:10:06,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:10:06,773 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 22:10:06,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739267488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:06,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:06,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:06,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424717088] [2021-06-05 22:10:06,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:06,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:06,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:06,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:06,774 INFO L87 Difference]: Start difference. First operand 826 states and 2711 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 22:10:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:07,625 INFO L93 Difference]: Finished difference Result 1267 states and 3932 transitions. [2021-06-05 22:10:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:07,626 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 22:10:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:07,628 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 22:10:07,628 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 22:10:07,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 22:10:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 818. [2021-06-05 22:10:07,638 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 22:10:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2687 transitions. [2021-06-05 22:10:07,640 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2687 transitions. Word has length 22 [2021-06-05 22:10:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:07,640 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2687 transitions. [2021-06-05 22:10:07,640 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 22:10:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2687 transitions. [2021-06-05 22:10:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:07,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:07,641 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:07,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8177 [2021-06-05 22:10:07,842 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:07,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1040102800, now seen corresponding path program 666 times [2021-06-05 22:10:07,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:07,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468267775] [2021-06-05 22:10:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:07,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:07,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468267775] [2021-06-05 22:10:07,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468267775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:07,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435189494] [2021-06-05 22:10:07,991 INFO L93 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 22:10:08,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:08,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:08,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:08,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435189494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:08,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:08,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:08,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839993416] [2021-06-05 22:10:08,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:08,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:08,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:08,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:08,488 INFO L87 Difference]: Start difference. First operand 818 states and 2687 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 22:10:09,098 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 22:10:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:09,329 INFO L93 Difference]: Finished difference Result 1210 states and 3767 transitions. [2021-06-05 22:10:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:09,330 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 22:10:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:09,331 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 22:10:09,331 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:10:09,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:10:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 824. [2021-06-05 22:10:09,341 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 22:10:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2709 transitions. [2021-06-05 22:10:09,342 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2709 transitions. Word has length 22 [2021-06-05 22:10:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:09,342 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2709 transitions. [2021-06-05 22:10:09,342 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 22:10:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2709 transitions. [2021-06-05 22:10:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:09,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:09,343 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:09,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8196,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:09,543 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash -453804922, now seen corresponding path program 667 times [2021-06-05 22:10:09,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:09,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34631380] [2021-06-05 22:10:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:09,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:09,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34631380] [2021-06-05 22:10:09,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34631380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:09,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87430528] [2021-06-05 22:10:09,690 INFO 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 22:10:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:09,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:10,143 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 22:10:10,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87430528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:10,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:10,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:10,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383948109] [2021-06-05 22:10:10,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:10,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:10,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:10,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:10,144 INFO L87 Difference]: Start difference. First operand 824 states and 2709 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 22:10:10,850 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-05 22:10:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:11,055 INFO L93 Difference]: Finished difference Result 1216 states and 3774 transitions. [2021-06-05 22:10:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:11,055 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 22:10:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:11,057 INFO L225 Difference]: With dead ends: 1216 [2021-06-05 22:10:11,057 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:10:11,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:10:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 821. [2021-06-05 22:10:11,065 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 22:10:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2698 transitions. [2021-06-05 22:10:11,067 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2698 transitions. Word has length 22 [2021-06-05 22:10:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:11,067 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2698 transitions. [2021-06-05 22:10:11,067 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 22:10:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2698 transitions. [2021-06-05 22:10:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:11,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:11,068 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:11,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8213 [2021-06-05 22:10:11,268 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 84050656, now seen corresponding path program 668 times [2021-06-05 22:10:11,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:11,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369922965] [2021-06-05 22:10:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:11,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:11,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369922965] [2021-06-05 22:10:11,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369922965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:11,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816104858] [2021-06-05 22:10:11,428 INFO L93 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 22:10:11,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:11,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:11,886 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 22:10:11,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816104858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:11,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:11,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968635941] [2021-06-05 22:10:11,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:11,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:11,887 INFO L87 Difference]: Start difference. First operand 821 states and 2698 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 22:10:12,558 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-06-05 22:10:12,704 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2021-06-05 22:10:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:12,796 INFO L93 Difference]: Finished difference Result 1174 states and 3679 transitions. [2021-06-05 22:10:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:12,796 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 22:10:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:12,798 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 22:10:12,798 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 22:10:12,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 868.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 22:10:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 813. [2021-06-05 22:10:12,807 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 22:10:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 22:10:12,808 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 22:10:12,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:12,808 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 22:10:12,808 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 22:10:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 22:10:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:12,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:12,809 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:13,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8228,693 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:13,010 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1680692291, now seen corresponding path program 669 times [2021-06-05 22:10:13,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:13,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404202283] [2021-06-05 22:10:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:13,088 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 22:10:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404202283] [2021-06-05 22:10:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404202283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442307366] [2021-06-05 22:10:13,088 INFO L93 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 22:10:13,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:10:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:10:13,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:13,272 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 22:10:13,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,275 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 22:10:13,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,278 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 22:10:13,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:13,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,283 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 22:10:13,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:13,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:13,289 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:13,314 INFO L628 ElimStorePlain]: treesize reduction 14, result has 66.7 percent of original size [2021-06-05 22:10:13,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:13,315 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-06-05 22:10:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:13,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442307366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:13,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:13,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:10:13,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448011227] [2021-06-05 22:10:13,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:10:13,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:10:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:10:13,379 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 22:10:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:13,800 INFO L93 Difference]: Finished difference Result 1284 states and 4007 transitions. [2021-06-05 22:10:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:13,800 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 22:10:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:13,802 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 22:10:13,802 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 22:10:13,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 22:10:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 820. [2021-06-05 22:10:13,811 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 22:10:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2710 transitions. [2021-06-05 22:10:13,812 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2710 transitions. Word has length 22 [2021-06-05 22:10:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:13,812 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2710 transitions. [2021-06-05 22:10:13,812 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 22:10:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2710 transitions. [2021-06-05 22:10:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:13,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:13,813 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:14,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8243,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:14,014 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash -671317128, now seen corresponding path program 670 times [2021-06-05 22:10:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:14,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351634818] [2021-06-05 22:10:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:14,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:14,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351634818] [2021-06-05 22:10:14,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351634818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:14,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086366458] [2021-06-05 22:10:14,145 INFO L93 rtionOrderModulation]: Changing 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 22:10:14,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:14,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:14,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:14,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:14,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:14,484 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 12 treesize of output 8 [2021-06-05 22:10:14,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:14,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,547 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 22:10:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:14,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:14,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:10:14,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:14,589 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-06-05 22:10:14,590 INFO L518 ElimStorePlain]: Eliminatee v_prenex_337 vanished before elimination [2021-06-05 22:10:14,591 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 22:10:14,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 22:10:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:14,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086366458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:14,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:14,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:14,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162358071] [2021-06-05 22:10:14,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:14,688 INFO L87 Difference]: Start difference. First operand 820 states and 2710 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 22:10:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:15,484 INFO L93 Difference]: Finished difference Result 1417 states and 4388 transitions. [2021-06-05 22:10:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:15,485 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 22:10:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:15,487 INFO L225 Difference]: With dead ends: 1417 [2021-06-05 22:10:15,487 INFO L226 Difference]: Without dead ends: 1417 [2021-06-05 22:10:15,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-05 22:10:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 832. [2021-06-05 22:10:15,498 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 22:10:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-06-05 22:10:15,500 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-06-05 22:10:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:15,500 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-06-05 22:10:15,500 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 22:10:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-06-05 22:10:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:15,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:15,501 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:15,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8250,695 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:15,701 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 487326402, now seen corresponding path program 671 times [2021-06-05 22:10:15,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:15,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668724990] [2021-06-05 22:10:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:15,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:15,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668724990] [2021-06-05 22:10:15,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668724990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:15,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126676290] [2021-06-05 22:10:15,827 INFO L93 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 22:10:15,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:16,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:16,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:16,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:10:16,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:16,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:16,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:16,242 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 22:10:16,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:16,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:16,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:16,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:16,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:16,284 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-06-05 22:10:16,285 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:16,286 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 22:10:16,286 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 22:10:16,377 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 22:10:16,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126676290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:16,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:16,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:16,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948407774] [2021-06-05 22:10:16,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:16,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:16,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:16,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:16,378 INFO L87 Difference]: Start difference. First operand 832 states and 2751 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 22:10:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:17,159 INFO L93 Difference]: Finished difference Result 1449 states and 4447 transitions. [2021-06-05 22:10:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:17,160 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 22:10:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:17,162 INFO L225 Difference]: With dead ends: 1449 [2021-06-05 22:10:17,162 INFO L226 Difference]: Without dead ends: 1449 [2021-06-05 22:10:17,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 713.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-06-05 22:10:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 838. [2021-06-05 22:10:17,172 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 22:10:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2776 transitions. [2021-06-05 22:10:17,174 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2776 transitions. Word has length 22 [2021-06-05 22:10:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:17,174 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2776 transitions. [2021-06-05 22:10:17,174 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 22:10:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2776 transitions. [2021-06-05 22:10:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:17,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:17,175 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:17,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8270,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:17,375 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:17,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1006581320, now seen corresponding path program 672 times [2021-06-05 22:10:17,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:17,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900962006] [2021-06-05 22:10:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:17,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900962006] [2021-06-05 22:10:17,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900962006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942610342] [2021-06-05 22:10:17,502 INFO L93 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 22:10:17,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:17,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:17,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:17,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:17,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:17,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,849 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 5 treesize of output 3 [2021-06-05 22:10:17,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,939 INFO L628 ElimStorePlain]: treesize reduction 33, result has 75.0 percent of original size [2021-06-05 22:10:17,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:17,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:17,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:17,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:17,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:17,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:17,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:18,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:18,011 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 22:10:18,011 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 22:10:18,099 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 22:10:18,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942610342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:18,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:18,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:18,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748793740] [2021-06-05 22:10:18,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:18,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:18,100 INFO L87 Difference]: Start difference. First operand 838 states and 2776 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 22:10:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:18,904 INFO L93 Difference]: Finished difference Result 1406 states and 4338 transitions. [2021-06-05 22:10:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:18,904 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 22:10:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:18,906 INFO L225 Difference]: With dead ends: 1406 [2021-06-05 22:10:18,906 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 22:10:18,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 705.5ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 22:10:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 830. [2021-06-05 22:10:18,916 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 22:10:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2752 transitions. [2021-06-05 22:10:18,917 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2752 transitions. Word has length 22 [2021-06-05 22:10:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:18,917 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2752 transitions. [2021-06-05 22:10:18,917 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 22:10:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2752 transitions. [2021-06-05 22:10:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:18,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:18,918 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:19,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8295,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:19,119 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash -260804643, now seen corresponding path program 673 times [2021-06-05 22:10:19,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:19,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204164700] [2021-06-05 22:10:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:19,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:19,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204164700] [2021-06-05 22:10:19,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204164700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:19,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412536586] [2021-06-05 22:10:19,193 INFO 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 22:10:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:19,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:19,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:19,399 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 22:10:19,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:19,403 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 13 treesize of output 9 [2021-06-05 22:10:19,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:19,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:19,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:19,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:19,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:19,435 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:10:19,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:19,436 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 22:10:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:19,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412536586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:19,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:19,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:10:19,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561867283] [2021-06-05 22:10:19,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:10:19,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:10:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:19,514 INFO L87 Difference]: Start difference. First operand 830 states and 2752 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:10:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:20,120 INFO L93 Difference]: Finished difference Result 1294 states and 3999 transitions. [2021-06-05 22:10:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:10:20,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:10:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:20,122 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 22:10:20,122 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:10:20,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:10:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 810. [2021-06-05 22:10:20,139 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 22:10:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2661 transitions. [2021-06-05 22:10:20,141 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2661 transitions. Word has length 22 [2021-06-05 22:10:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:20,141 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2661 transitions. [2021-06-05 22:10:20,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 22:10:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2661 transitions. [2021-06-05 22:10:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:20,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:20,142 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:20,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8317,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:20,342 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1147259970, now seen corresponding path program 674 times [2021-06-05 22:10:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:20,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268731659] [2021-06-05 22:10:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:20,477 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 22:10:20,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268731659] [2021-06-05 22:10:20,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268731659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789877245] [2021-06-05 22:10:20,477 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 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 22:10:20,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:20,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:20,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:20,821 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_349, v_prenex_350, v_prenex_352], 1=[v_prenex_354, v_prenex_356, nondet_0]} [2021-06-05 22:10:20,826 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 6 treesize of output 4 [2021-06-05 22:10:20,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:20,960 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 22:10:20,960 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 22:10:20,964 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 5 treesize of output 3 [2021-06-05 22:10:20,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:21,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:21,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:21,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:21,090 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 5 treesize of output 3 [2021-06-05 22:10:21,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:21,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:21,094 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 12 treesize of output 8 [2021-06-05 22:10:21,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:21,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:21,153 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 22:10:21,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:21,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:21,158 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:21,242 INFO L628 ElimStorePlain]: treesize reduction 15, result has 85.6 percent of original size [2021-06-05 22:10:21,243 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:21,244 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 22:10:21,244 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 22:10:21,340 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 22:10:21,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789877245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:21,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:21,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:21,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423153319] [2021-06-05 22:10:21,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:21,340 INFO L87 Difference]: Start difference. First operand 810 states and 2661 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 22:10:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:22,203 INFO L93 Difference]: Finished difference Result 1340 states and 4171 transitions. [2021-06-05 22:10:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:22,204 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 22:10:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:22,205 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 22:10:22,205 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 22:10:22,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 741.3ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 22:10:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 806. [2021-06-05 22:10:22,215 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 22:10:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2643 transitions. [2021-06-05 22:10:22,216 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2643 transitions. Word has length 22 [2021-06-05 22:10:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:22,216 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2643 transitions. [2021-06-05 22:10:22,216 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 22:10:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2643 transitions. [2021-06-05 22:10:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:22,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:22,217 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:22,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8329,699 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:22,418 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:22,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1514655934, now seen corresponding path program 675 times [2021-06-05 22:10:22,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:22,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112710162] [2021-06-05 22:10:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:22,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112710162] [2021-06-05 22:10:22,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112710162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920190904] [2021-06-05 22:10:22,554 INFO L93 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 22:10:22,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:10:22,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:22,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:22,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:22,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:22,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:10:22,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:10:22,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:22,996 INFO L628 ElimStorePlain]: treesize reduction 33, result has 75.0 percent of original size [2021-06-05 22:10:22,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:22,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:23,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:23,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:23,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:23,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:23,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:23,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:23,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:23,066 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 22:10:23,066 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 22:10:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:23,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920190904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:23,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:23,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:23,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633103886] [2021-06-05 22:10:23,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:23,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:23,170 INFO L87 Difference]: Start difference. First operand 806 states and 2643 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 22:10:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:24,040 INFO L93 Difference]: Finished difference Result 1264 states and 3976 transitions. [2021-06-05 22:10:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:24,040 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 22:10:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:24,041 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 22:10:24,041 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 22:10:24,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 772.5ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 22:10:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 800. [2021-06-05 22:10:24,050 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 22:10:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2619 transitions. [2021-06-05 22:10:24,052 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2619 transitions. Word has length 22 [2021-06-05 22:10:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:24,052 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2619 transitions. [2021-06-05 22:10:24,052 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 22:10:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2619 transitions. [2021-06-05 22:10:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:24,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:24,053 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:24,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8346 [2021-06-05 22:10:24,253 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2112124496, now seen corresponding path program 676 times [2021-06-05 22:10:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:24,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482505857] [2021-06-05 22:10:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:24,395 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 22:10:24,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:24,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482505857] [2021-06-05 22:10:24,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482505857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:24,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426105961] [2021-06-05 22:10:24,395 INFO L93 rtionOrderModulation]: Changing 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 22:10:24,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:24,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:24,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:10:24,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,794 INFO L628 ElimStorePlain]: treesize reduction 21, result has 78.4 percent of original size [2021-06-05 22:10:24,797 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 6 treesize of output 4 [2021-06-05 22:10:24,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,800 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 13 treesize of output 9 [2021-06-05 22:10:24,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,839 INFO L628 ElimStorePlain]: treesize reduction 13, result has 77.6 percent of original size [2021-06-05 22:10:24,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:24,842 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 12 treesize of output 8 [2021-06-05 22:10:24,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:24,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:24,859 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 22:10:24,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 22:10:24,961 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 22:10:24,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426105961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:24,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:24,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:24,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863247128] [2021-06-05 22:10:24,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:24,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:24,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:24,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:24,961 INFO L87 Difference]: Start difference. First operand 800 states and 2619 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 22:10:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:25,842 INFO L93 Difference]: Finished difference Result 1364 states and 4234 transitions. [2021-06-05 22:10:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:25,842 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 22:10:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:25,844 INFO L225 Difference]: With dead ends: 1364 [2021-06-05 22:10:25,844 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 22:10:25,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 22:10:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 808. [2021-06-05 22:10:25,854 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 22:10:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2655 transitions. [2021-06-05 22:10:25,855 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2655 transitions. Word has length 22 [2021-06-05 22:10:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:25,855 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2655 transitions. [2021-06-05 22:10:25,855 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 22:10:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2655 transitions. [2021-06-05 22:10:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:25,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:25,856 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:26,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8367 [2021-06-05 22:10:26,056 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash 618216774, now seen corresponding path program 677 times [2021-06-05 22:10:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:26,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414275027] [2021-06-05 22:10:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:26,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:26,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414275027] [2021-06-05 22:10:26,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414275027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:26,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980894283] [2021-06-05 22:10:26,186 INFO L93 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 22:10:26,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:26,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:26,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:26,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:26,522 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_372, v_prenex_367], 1=[v_prenex_368, nondet_0, v_prenex_369]} [2021-06-05 22:10:26,526 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 6 treesize of output 4 [2021-06-05 22:10:26,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,615 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-06-05 22:10:26,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_367 vanished before elimination [2021-06-05 22:10:26,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:26,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:26,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:26,654 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:26,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:26,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:26,658 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 13 treesize of output 9 [2021-06-05 22:10:26,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:26,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:26,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:26,684 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 22:10:26,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 22:10:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:26,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980894283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:26,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:26,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:26,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954315123] [2021-06-05 22:10:26,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:26,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:26,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:26,796 INFO L87 Difference]: Start difference. First operand 808 states and 2655 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 22:10:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:27,636 INFO L93 Difference]: Finished difference Result 1350 states and 4183 transitions. [2021-06-05 22:10:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:27,636 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 22:10:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:27,638 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 22:10:27,638 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 22:10:27,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 22:10:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 805. [2021-06-05 22:10:27,648 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 22:10:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2644 transitions. [2021-06-05 22:10:27,649 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2644 transitions. Word has length 22 [2021-06-05 22:10:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:27,649 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2644 transitions. [2021-06-05 22:10:27,649 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 22:10:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2644 transitions. [2021-06-05 22:10:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:27,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:27,650 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:27,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8388,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:27,851 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:27,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1431442362, now seen corresponding path program 678 times [2021-06-05 22:10:27,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:27,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218806019] [2021-06-05 22:10:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:28,014 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 22:10:28,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218806019] [2021-06-05 22:10:28,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218806019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850777553] [2021-06-05 22:10:28,014 INFO L93 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 22:10:28,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:28,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:28,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:28,452 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_380, v_prenex_375], 1=[v_prenex_376, v_prenex_377, nondet_0]} [2021-06-05 22:10:28,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:28,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:28,555 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-06-05 22:10:28,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_375 vanished before elimination [2021-06-05 22:10:28,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_376 vanished before elimination [2021-06-05 22:10:28,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:28,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:28,559 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 13 treesize of output 9 [2021-06-05 22:10:28,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:28,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:28,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:28,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:28,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:28,589 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 12 treesize of output 8 [2021-06-05 22:10:28,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:28,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:28,613 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 22:10:28,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 22:10:28,721 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 22:10:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850777553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:28,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:28,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441985727] [2021-06-05 22:10:28,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:28,722 INFO L87 Difference]: Start difference. First operand 805 states and 2644 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 22:10:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:29,671 INFO L93 Difference]: Finished difference Result 1372 states and 4247 transitions. [2021-06-05 22:10:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:29,671 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 22:10:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:29,673 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 22:10:29,673 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 22:10:29,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 22:10:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 801. [2021-06-05 22:10:29,683 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 22:10:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2624 transitions. [2021-06-05 22:10:29,684 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2624 transitions. Word has length 22 [2021-06-05 22:10:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:29,684 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2624 transitions. [2021-06-05 22:10:29,684 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 22:10:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2624 transitions. [2021-06-05 22:10:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:29,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:29,685 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:29,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8407 [2021-06-05 22:10:29,886 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1410705834, now seen corresponding path program 679 times [2021-06-05 22:10:29,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:29,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613950423] [2021-06-05 22:10:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:30,018 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 22:10:30,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:30,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613950423] [2021-06-05 22:10:30,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613950423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:30,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064297816] [2021-06-05 22:10:30,019 INFO 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 22:10:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:30,361 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_383, nondet_0], 1=[v_prenex_384, v_prenex_386, v_prenex_388]} [2021-06-05 22:10:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:30,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,494 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-06-05 22:10:30,494 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-06-05 22:10:30,494 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:30,494 INFO L518 ElimStorePlain]: Eliminatee v_prenex_384 vanished before elimination [2021-06-05 22:10:30,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:30,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:30,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:30,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:30,559 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 13 treesize of output 9 [2021-06-05 22:10:30,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:30,626 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-06-05 22:10:30,628 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 22:10:30,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 22:10:30,755 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 22:10:30,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064297816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:30,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:30,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:30,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081320448] [2021-06-05 22:10:30,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:30,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:30,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:30,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:30,756 INFO L87 Difference]: Start difference. First operand 801 states and 2624 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 22:10:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:31,673 INFO L93 Difference]: Finished difference Result 1278 states and 4007 transitions. [2021-06-05 22:10:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:31,673 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 22:10:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:31,675 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 22:10:31,675 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 22:10:31,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 22:10:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 803. [2021-06-05 22:10:31,685 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 22:10:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2629 transitions. [2021-06-05 22:10:31,686 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2629 transitions. Word has length 22 [2021-06-05 22:10:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:31,686 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2629 transitions. [2021-06-05 22:10:31,686 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 22:10:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2629 transitions. [2021-06-05 22:10:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:31,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:31,687 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:31,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8426,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:31,888 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash -130763838, now seen corresponding path program 680 times [2021-06-05 22:10:31,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:31,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091595576] [2021-06-05 22:10:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:32,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:32,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091595576] [2021-06-05 22:10:32,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091595576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:32,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669789952] [2021-06-05 22:10:32,054 INFO L93 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 22:10:32,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:32,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:32,644 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 22:10:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669789952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:32,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:32,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:32,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358927592] [2021-06-05 22:10:32,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:32,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:32,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:32,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:32,645 INFO L87 Difference]: Start difference. First operand 803 states and 2629 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 22:10:33,274 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 22:10:33,474 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-05 22:10:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:33,717 INFO L93 Difference]: Finished difference Result 1217 states and 3816 transitions. [2021-06-05 22:10:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:33,718 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 22:10:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:33,720 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 22:10:33,720 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 22:10:33,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1091.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 22:10:33,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 810. [2021-06-05 22:10:33,729 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 22:10:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2656 transitions. [2021-06-05 22:10:33,730 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2656 transitions. Word has length 22 [2021-06-05 22:10:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:33,730 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2656 transitions. [2021-06-05 22:10:33,730 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 22:10:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2656 transitions. [2021-06-05 22:10:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:33,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:33,731 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:33,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8445 [2021-06-05 22:10:33,932 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1624671560, now seen corresponding path program 681 times [2021-06-05 22:10:33,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:33,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769958501] [2021-06-05 22:10:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:34,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:34,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769958501] [2021-06-05 22:10:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769958501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:34,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660237831] [2021-06-05 22:10:34,151 INFO L93 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 22:10:34,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:34,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:34,735 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 22:10:34,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660237831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:34,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:34,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549904537] [2021-06-05 22:10:34,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:34,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:34,736 INFO L87 Difference]: Start difference. First operand 810 states and 2656 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 22:10:35,363 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 22:10:35,619 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-06-05 22:10:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:35,852 INFO L93 Difference]: Finished difference Result 1223 states and 3823 transitions. [2021-06-05 22:10:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:35,853 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 22:10:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:35,854 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 22:10:35,854 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 22:10:35,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1138.8ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 22:10:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 807. [2021-06-05 22:10:35,863 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 22:10:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2645 transitions. [2021-06-05 22:10:35,864 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2645 transitions. Word has length 22 [2021-06-05 22:10:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:35,865 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2645 transitions. [2021-06-05 22:10:35,865 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 22:10:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2645 transitions. [2021-06-05 22:10:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:35,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:35,866 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:36,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8460,706 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:36,066 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:36,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1086815982, now seen corresponding path program 682 times [2021-06-05 22:10:36,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:36,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018290002] [2021-06-05 22:10:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:36,242 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 22:10:36,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:36,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018290002] [2021-06-05 22:10:36,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018290002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:36,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959425796] [2021-06-05 22:10:36,243 INFO L93 rtionOrderModulation]: Changing 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 22:10:36,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:36,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:36,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:36,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959425796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:36,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:36,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:36,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956576162] [2021-06-05 22:10:36,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:36,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:36,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:36,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:36,799 INFO L87 Difference]: Start difference. First operand 807 states and 2645 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 22:10:37,443 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 22:10:37,708 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-06-05 22:10:37,891 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2021-06-05 22:10:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:37,981 INFO L93 Difference]: Finished difference Result 1187 states and 3741 transitions. [2021-06-05 22:10:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:37,982 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 22:10:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:37,984 INFO L225 Difference]: With dead ends: 1187 [2021-06-05 22:10:37,984 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 22:10:37,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1191.5ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 22:10:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 804. [2021-06-05 22:10:37,999 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 22:10:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-06-05 22:10:38,001 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-06-05 22:10:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:38,001 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-06-05 22:10:38,001 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 22:10:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-06-05 22:10:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:38,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:38,002 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:38,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8481 [2021-06-05 22:10:38,202 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:38,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1687813260, now seen corresponding path program 683 times [2021-06-05 22:10:38,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:38,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542751839] [2021-06-05 22:10:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:38,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:38,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542751839] [2021-06-05 22:10:38,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542751839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:38,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985551700] [2021-06-05 22:10:38,360 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 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 22:10:38,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:38,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:38,837 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 22:10:38,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:38,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:38,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:38,918 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:10:38,919 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:38,919 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 22:10:38,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:10:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:38,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985551700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:38,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:38,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:38,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261922540] [2021-06-05 22:10:38,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:38,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:38,997 INFO L87 Difference]: Start difference. First operand 804 states and 2634 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 22:10:39,631 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-06-05 22:10:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:40,022 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-06-05 22:10:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:40,023 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 22:10:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:40,025 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 22:10:40,025 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 22:10:40,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1018.3ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 22:10:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 812. [2021-06-05 22:10:40,035 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 22:10:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2670 transitions. [2021-06-05 22:10:40,036 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2670 transitions. Word has length 22 [2021-06-05 22:10:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:40,036 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2670 transitions. [2021-06-05 22:10:40,036 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 22:10:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2670 transitions. [2021-06-05 22:10:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:40,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:40,037 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:40,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8504,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:40,237 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash 193905538, now seen corresponding path program 684 times [2021-06-05 22:10:40,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:40,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418589616] [2021-06-05 22:10:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:40,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:40,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418589616] [2021-06-05 22:10:40,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418589616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:40,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723778845] [2021-06-05 22:10:40,392 INFO L93 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 22:10:40,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:40,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:40,856 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 8 treesize of output 1 [2021-06-05 22:10:40,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:40,889 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:10:40,889 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:40,890 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 22:10:40,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:10:40,964 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 22:10:40,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723778845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:40,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:40,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:40,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885212569] [2021-06-05 22:10:40,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:40,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:40,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:40,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:40,965 INFO L87 Difference]: Start difference. First operand 812 states and 2670 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 22:10:41,574 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 22:10:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:41,951 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-06-05 22:10:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:41,951 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 22:10:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:41,953 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 22:10:41,953 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 22:10:41,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 22:10:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 809. [2021-06-05 22:10:41,962 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 22:10:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2659 transitions. [2021-06-05 22:10:41,963 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2659 transitions. Word has length 22 [2021-06-05 22:10:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:41,964 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2659 transitions. [2021-06-05 22:10:41,964 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 22:10:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2659 transitions. [2021-06-05 22:10:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:41,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:41,965 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:42,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8520 [2021-06-05 22:10:42,165 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1855753598, now seen corresponding path program 685 times [2021-06-05 22:10:42,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:42,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129233613] [2021-06-05 22:10:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:42,336 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 22:10:42,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:42,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129233613] [2021-06-05 22:10:42,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129233613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:42,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414266715] [2021-06-05 22:10:42,336 INFO 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 22:10:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:42,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:42,756 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 8 treesize of output 1 [2021-06-05 22:10:42,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:42,789 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:10:42,789 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:42,790 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 22:10:42,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:10:42,869 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 22:10:42,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414266715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:42,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:42,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:42,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303836142] [2021-06-05 22:10:42,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:42,870 INFO L87 Difference]: Start difference. First operand 809 states and 2659 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 22:10:43,459 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 22:10:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:43,919 INFO L93 Difference]: Finished difference Result 1275 states and 3962 transitions. [2021-06-05 22:10:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:43,920 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 22:10:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:43,921 INFO L225 Difference]: With dead ends: 1275 [2021-06-05 22:10:43,921 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:10:43,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 979.2ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:10:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 805. [2021-06-05 22:10:43,931 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 22:10:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2639 transitions. [2021-06-05 22:10:43,932 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2639 transitions. Word has length 22 [2021-06-05 22:10:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:43,932 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2639 transitions. [2021-06-05 22:10:43,932 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 22:10:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2639 transitions. [2021-06-05 22:10:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:43,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:43,933 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:44,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8557,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:44,133 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:44,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1835017070, now seen corresponding path program 686 times [2021-06-05 22:10:44,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:44,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567833655] [2021-06-05 22:10:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:44,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:44,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567833655] [2021-06-05 22:10:44,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567833655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:44,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731864925] [2021-06-05 22:10:44,290 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 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 22:10:44,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:44,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:44,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:44,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:44,760 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 8 treesize of output 1 [2021-06-05 22:10:44,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:44,793 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:10:44,793 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:44,793 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 22:10:44,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:10:44,867 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 22:10:44,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731864925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:44,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:44,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:44,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381267483] [2021-06-05 22:10:44,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:44,868 INFO L87 Difference]: Start difference. First operand 805 states and 2639 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 22:10:45,480 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-06-05 22:10:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:45,920 INFO L93 Difference]: Finished difference Result 1252 states and 3909 transitions. [2021-06-05 22:10:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:45,920 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 22:10:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:45,922 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 22:10:45,922 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 22:10:45,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1004.0ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 22:10:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 804. [2021-06-05 22:10:45,931 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 22:10:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-06-05 22:10:45,932 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-06-05 22:10:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:45,933 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-06-05 22:10:45,933 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 22:10:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-06-05 22:10:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:45,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:45,934 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:46,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8578 [2021-06-05 22:10:46,134 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 441092610, now seen corresponding path program 687 times [2021-06-05 22:10:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096817139] [2021-06-05 22:10:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:46,323 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 22:10:46,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:46,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096817139] [2021-06-05 22:10:46,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096817139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:46,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144004591] [2021-06-05 22:10:46,323 INFO L93 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 22:10:46,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:46,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:46,891 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 22:10:46,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144004591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:46,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:46,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:46,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864602993] [2021-06-05 22:10:46,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:46,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:46,892 INFO L87 Difference]: Start difference. First operand 804 states and 2634 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 22:10:47,530 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-06-05 22:10:47,769 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-05 22:10:47,950 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2021-06-05 22:10:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:48,041 INFO L93 Difference]: Finished difference Result 1178 states and 3717 transitions. [2021-06-05 22:10:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:48,041 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 22:10:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:48,042 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 22:10:48,043 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 22:10:48,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1199.4ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 22:10:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 806. [2021-06-05 22:10:48,052 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 22:10:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-06-05 22:10:48,053 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-06-05 22:10:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:48,053 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-06-05 22:10:48,053 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 22:10:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-06-05 22:10:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:48,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:48,054 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:48,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8595 [2021-06-05 22:10:48,255 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:48,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1192493048, now seen corresponding path program 688 times [2021-06-05 22:10:48,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:48,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844684970] [2021-06-05 22:10:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:48,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:48,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844684970] [2021-06-05 22:10:48,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844684970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:48,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149920069] [2021-06-05 22:10:48,430 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 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 22:10:48,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:48,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:48,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:48,913 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 22:10:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:10:49,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,046 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 22:10:49,046 INFO L518 ElimStorePlain]: Eliminatee v_prenex_425 vanished before elimination [2021-06-05 22:10:49,046 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 22:10:49,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 22:10:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:49,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149920069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:49,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:49,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:49,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077757398] [2021-06-05 22:10:49,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:49,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:49,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:49,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:49,093 INFO L87 Difference]: Start difference. First operand 806 states and 2639 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 22:10:49,717 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2021-06-05 22:10:49,949 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2021-06-05 22:10:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:50,206 INFO L93 Difference]: Finished difference Result 1180 states and 3724 transitions. [2021-06-05 22:10:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:50,206 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 22:10:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:50,208 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 22:10:50,208 INFO L226 Difference]: Without dead ends: 1174 [2021-06-05 22:10:50,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1170.0ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-05 22:10:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 806. [2021-06-05 22:10:50,216 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 22:10:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-06-05 22:10:50,217 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-06-05 22:10:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:50,217 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-06-05 22:10:50,218 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 22:10:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-06-05 22:10:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:50,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:50,219 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:50,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8614,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:50,419 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash -940825456, now seen corresponding path program 689 times [2021-06-05 22:10:50,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:50,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297818689] [2021-06-05 22:10:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:50,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:50,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297818689] [2021-06-05 22:10:50,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297818689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:50,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278724638] [2021-06-05 22:10:50,549 INFO L93 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 22:10:50,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:50,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:50,971 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 22:10:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:51,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278724638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:51,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:51,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:51,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194855319] [2021-06-05 22:10:51,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:51,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:51,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:51,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:51,186 INFO L87 Difference]: Start difference. First operand 806 states and 2639 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 22:10:51,680 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2021-06-05 22:10:51,916 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 84 [2021-06-05 22:10:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:52,299 INFO L93 Difference]: Finished difference Result 1214 states and 3807 transitions. [2021-06-05 22:10:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:52,299 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 22:10:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:52,301 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 22:10:52,301 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 22:10:52,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1176.1ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 22:10:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 816. [2021-06-05 22:10:52,310 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 22:10:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2677 transitions. [2021-06-05 22:10:52,311 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2677 transitions. Word has length 22 [2021-06-05 22:10:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:52,311 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2677 transitions. [2021-06-05 22:10:52,311 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 22:10:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2677 transitions. [2021-06-05 22:10:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:52,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:52,312 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:52,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8639 [2021-06-05 22:10:52,512 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1860234118, now seen corresponding path program 690 times [2021-06-05 22:10:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:52,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171846216] [2021-06-05 22:10:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:52,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:52,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171846216] [2021-06-05 22:10:52,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171846216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:52,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854108276] [2021-06-05 22:10:52,638 INFO L93 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 22:10:52,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:53,232 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 22:10:53,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854108276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:53,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:53,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:53,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527192467] [2021-06-05 22:10:53,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:53,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:53,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:53,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:53,233 INFO L87 Difference]: Start difference. First operand 816 states and 2677 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 22:10:53,738 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 22:10:53,933 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-05 22:10:54,092 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 22:10:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:54,318 INFO L93 Difference]: Finished difference Result 1220 states and 3814 transitions. [2021-06-05 22:10:54,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:54,319 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 22:10:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:54,320 INFO L225 Difference]: With dead ends: 1220 [2021-06-05 22:10:54,320 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 22:10:54,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1094.9ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 22:10:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 813. [2021-06-05 22:10:54,329 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 22:10:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2666 transitions. [2021-06-05 22:10:54,330 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2666 transitions. Word has length 22 [2021-06-05 22:10:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:54,330 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2666 transitions. [2021-06-05 22:10:54,330 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 22:10:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2666 transitions. [2021-06-05 22:10:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:54,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:54,331 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:54,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8652 [2021-06-05 22:10:54,532 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1896877600, now seen corresponding path program 691 times [2021-06-05 22:10:54,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:54,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158282289] [2021-06-05 22:10:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:54,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:54,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158282289] [2021-06-05 22:10:54,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158282289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:54,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330729189] [2021-06-05 22:10:54,667 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 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 22:10:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:55,269 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 22:10:55,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330729189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:55,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:55,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:55,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929203558] [2021-06-05 22:10:55,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:55,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:55,270 INFO L87 Difference]: Start difference. First operand 813 states and 2666 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 22:10:55,792 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2021-06-05 22:10:55,987 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2021-06-05 22:10:56,299 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 22:10:56,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:56,389 INFO L93 Difference]: Finished difference Result 1184 states and 3732 transitions. [2021-06-05 22:10:56,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:56,389 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 22:10:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:56,391 INFO L225 Difference]: With dead ends: 1184 [2021-06-05 22:10:56,391 INFO L226 Difference]: Without dead ends: 1172 [2021-06-05 22:10:56,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1162.9ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-05 22:10:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 810. [2021-06-05 22:10:56,400 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 22:10:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2655 transitions. [2021-06-05 22:10:56,401 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2655 transitions. Word has length 22 [2021-06-05 22:10:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:56,401 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2655 transitions. [2021-06-05 22:10:56,401 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 22:10:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2655 transitions. [2021-06-05 22:10:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:56,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:56,402 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:56,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8670 [2021-06-05 22:10:56,602 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1891743430, now seen corresponding path program 692 times [2021-06-05 22:10:56,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:56,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116416784] [2021-06-05 22:10:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:56,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:56,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116416784] [2021-06-05 22:10:56,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116416784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:56,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112616083] [2021-06-05 22:10:56,718 INFO L93 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 22:10:56,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:56,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:57,299 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 22:10:57,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112616083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:57,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:57,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:57,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690058170] [2021-06-05 22:10:57,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:57,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:57,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:57,300 INFO L87 Difference]: Start difference. First operand 810 states and 2655 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 22:10:57,808 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2021-06-05 22:10:58,006 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 86 [2021-06-05 22:10:58,202 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 57 [2021-06-05 22:10:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:58,381 INFO L93 Difference]: Finished difference Result 1181 states and 3721 transitions. [2021-06-05 22:10:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:58,382 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 22:10:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:58,383 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 22:10:58,383 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 22:10:58,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1104.2ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 22:10:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 807. [2021-06-05 22:10:58,398 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 22:10:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2644 transitions. [2021-06-05 22:10:58,400 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2644 transitions. Word has length 22 [2021-06-05 22:10:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:58,400 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2644 transitions. [2021-06-05 22:10:58,400 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 22:10:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2644 transitions. [2021-06-05 22:10:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:10:58,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:58,401 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:58,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8687,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:58,601 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash -399510266, now seen corresponding path program 693 times [2021-06-05 22:10:58,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:58,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272431048] [2021-06-05 22:10:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:58,757 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 22:10:58,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272431048] [2021-06-05 22:10:58,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272431048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015230001] [2021-06-05 22:10:58,758 INFO L93 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 22:10:58,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:58,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:58,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:10:58,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:59,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015230001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:59,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:59,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:10:59,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729887758] [2021-06-05 22:10:59,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:59,385 INFO L87 Difference]: Start difference. First operand 807 states and 2644 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 22:10:59,847 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2021-06-05 22:11:00,050 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2021-06-05 22:11:00,297 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2021-06-05 22:11:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:00,533 INFO L93 Difference]: Finished difference Result 1223 states and 3829 transitions. [2021-06-05 22:11:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:00,533 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 22:11:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:00,535 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 22:11:00,535 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 22:11:00,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1252.5ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 22:11:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 814. [2021-06-05 22:11:00,544 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 22:11:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2671 transitions. [2021-06-05 22:11:00,546 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2671 transitions. Word has length 22 [2021-06-05 22:11:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:00,546 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2671 transitions. [2021-06-05 22:11:00,546 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 22:11:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2671 transitions. [2021-06-05 22:11:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:00,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:00,547 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:00,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8704,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:00,752 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1893417988, now seen corresponding path program 694 times [2021-06-05 22:11:00,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:00,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121639923] [2021-06-05 22:11:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:00,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:00,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121639923] [2021-06-05 22:11:00,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121639923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:00,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297172175] [2021-06-05 22:11:00,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:11:01,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:01,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:01,341 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 22:11:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:01,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297172175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:01,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:01,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:01,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171995934] [2021-06-05 22:11:01,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:01,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:01,595 INFO L87 Difference]: Start difference. First operand 814 states and 2671 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 22:11:02,060 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 22:11:02,269 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 22:11:02,466 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 69 [2021-06-05 22:11:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:02,695 INFO L93 Difference]: Finished difference Result 1229 states and 3836 transitions. [2021-06-05 22:11:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:02,695 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 22:11:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:02,697 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 22:11:02,697 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 22:11:02,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1258.5ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 22:11:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 811. [2021-06-05 22:11:02,706 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 22:11:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2660 transitions. [2021-06-05 22:11:02,707 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2660 transitions. Word has length 22 [2021-06-05 22:11:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:02,707 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2660 transitions. [2021-06-05 22:11:02,707 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 22:11:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2660 transitions. [2021-06-05 22:11:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:02,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:02,708 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:02,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8718 [2021-06-05 22:11:02,908 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:02,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1355562410, now seen corresponding path program 695 times [2021-06-05 22:11:02,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:02,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357500264] [2021-06-05 22:11:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:03,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357500264] [2021-06-05 22:11:03,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357500264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200816434] [2021-06-05 22:11:03,071 INFO L93 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 22:11:03,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:03,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:03,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:03,500 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 22:11:03,764 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 22:11:03,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200816434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:03,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:03,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:03,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596501693] [2021-06-05 22:11:03,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:03,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:03,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:03,765 INFO L87 Difference]: Start difference. First operand 811 states and 2660 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 22:11:04,256 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 22:11:04,472 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-06-05 22:11:04,725 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2021-06-05 22:11:04,900 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2021-06-05 22:11:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:04,986 INFO L93 Difference]: Finished difference Result 1193 states and 3754 transitions. [2021-06-05 22:11:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:04,987 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 22:11:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:04,988 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 22:11:04,988 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 22:11:04,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1385.6ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 22:11:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 808. [2021-06-05 22:11:04,997 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 22:11:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2649 transitions. [2021-06-05 22:11:04,998 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2649 transitions. Word has length 22 [2021-06-05 22:11:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:04,998 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2649 transitions. [2021-06-05 22:11:04,998 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 22:11:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2649 transitions. [2021-06-05 22:11:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:04,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:04,999 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:05,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8739,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:05,199 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1419066832, now seen corresponding path program 696 times [2021-06-05 22:11:05,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:05,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72539670] [2021-06-05 22:11:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:05,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72539670] [2021-06-05 22:11:05,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72539670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413556972] [2021-06-05 22:11:05,351 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 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 22:11:05,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:05,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:05,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:05,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:05,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:05,843 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:11:05,843 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:05,844 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 22:11:05,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:11:05,924 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 22:11:05,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413556972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:05,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:05,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136446988] [2021-06-05 22:11:05,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:05,924 INFO L87 Difference]: Start difference. First operand 808 states and 2649 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 22:11:06,374 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 22:11:06,586 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2021-06-05 22:11:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:06,957 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-06-05 22:11:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:06,957 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 22:11:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:06,959 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 22:11:06,959 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 22:11:06,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1046.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 22:11:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 816. [2021-06-05 22:11:06,968 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 22:11:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2685 transitions. [2021-06-05 22:11:06,970 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2685 transitions. Word has length 22 [2021-06-05 22:11:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:06,970 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2685 transitions. [2021-06-05 22:11:06,970 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 22:11:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2685 transitions. [2021-06-05 22:11:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:06,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:06,971 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:07,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8762 [2021-06-05 22:11:07,171 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:07,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:07,172 INFO L82 PathProgramCache]: Analyzing trace with hash -74840890, now seen corresponding path program 697 times [2021-06-05 22:11:07,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:07,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101603494] [2021-06-05 22:11:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:07,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:07,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101603494] [2021-06-05 22:11:07,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101603494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:07,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818393446] [2021-06-05 22:11:07,315 INFO 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 22:11:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:07,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:07,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:07,739 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 22:11:07,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:07,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:07,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,915 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:11:07,915 INFO L518 ElimStorePlain]: Eliminatee v_prenex_468 vanished before elimination [2021-06-05 22:11:07,915 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 22:11:07,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:11:07,995 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 22:11:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818393446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:07,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:07,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:07,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269448325] [2021-06-05 22:11:07,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:07,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:07,996 INFO L87 Difference]: Start difference. First operand 816 states and 2685 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 22:11:08,455 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 22:11:08,660 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-06-05 22:11:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:09,028 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-06-05 22:11:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:09,029 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 22:11:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:09,031 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 22:11:09,031 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 22:11:09,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1156.6ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 22:11:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 813. [2021-06-05 22:11:09,040 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 22:11:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 22:11:09,042 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 22:11:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:09,042 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 22:11:09,042 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 22:11:09,042 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 22:11:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:09,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:09,043 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:09,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8783,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:09,243 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:09,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2124500026, now seen corresponding path program 698 times [2021-06-05 22:11:09,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:09,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046804048] [2021-06-05 22:11:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:09,400 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 22:11:09,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:09,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046804048] [2021-06-05 22:11:09,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046804048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:09,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745997315] [2021-06-05 22:11:09,400 INFO L93 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 22:11:09,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:09,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:09,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:09,914 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 8 treesize of output 1 [2021-06-05 22:11:09,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:09,946 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 22:11:09,947 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:09,947 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 22:11:09,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:11:10,032 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 22:11:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745997315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:10,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:10,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691523556] [2021-06-05 22:11:10,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:10,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:10,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:10,033 INFO L87 Difference]: Start difference. First operand 813 states and 2674 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 22:11:10,502 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 22:11:10,710 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2021-06-05 22:11:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:11,163 INFO L93 Difference]: Finished difference Result 1275 states and 3962 transitions. [2021-06-05 22:11:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:11,163 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 22:11:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:11,165 INFO L225 Difference]: With dead ends: 1275 [2021-06-05 22:11:11,165 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:11:11,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1158.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:11:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:11:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 809. [2021-06-05 22:11:11,174 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 22:11:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2654 transitions. [2021-06-05 22:11:11,175 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2654 transitions. Word has length 22 [2021-06-05 22:11:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:11,175 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2654 transitions. [2021-06-05 22:11:11,175 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 22:11:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2654 transitions. [2021-06-05 22:11:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:11,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:11,176 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:11,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8807,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:11,377 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2103763498, now seen corresponding path program 699 times [2021-06-05 22:11:11,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:11,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85706090] [2021-06-05 22:11:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:11,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:11,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85706090] [2021-06-05 22:11:11,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85706090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:11,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104974465] [2021-06-05 22:11:11,525 INFO L93 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 22:11:11,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:11,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:11,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:11,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:12,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 22:11:12,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 8 treesize of output 9 [2021-06-05 22:11:12,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:12,341 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 41 [2021-06-05 22:11:12,341 INFO L628 ElimStorePlain]: treesize reduction 321, result has 22.7 percent of original size [2021-06-05 22:11:12,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_480 vanished before elimination [2021-06-05 22:11:12,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_481 vanished before elimination [2021-06-05 22:11:12,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_482 vanished before elimination [2021-06-05 22:11:12,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_483 vanished before elimination [2021-06-05 22:11:12,349 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 22:11:12,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 8 treesize of output 9 [2021-06-05 22:11:12,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:12,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:12,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_488 vanished before elimination [2021-06-05 22:11:12,387 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:12,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-06-05 22:11:12,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 9 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:11:12,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 19 variables, input treesize:419, output treesize:49 [2021-06-05 22:11:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104974465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:12,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:12,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:12,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509040717] [2021-06-05 22:11:12,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:12,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:12,511 INFO L87 Difference]: Start difference. First operand 809 states and 2654 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 22:11:13,028 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-06-05 22:11:13,198 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-06-05 22:11:13,391 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 22:11:13,570 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2021-06-05 22:11:13,788 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-06-05 22:11:13,989 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-06-05 22:11:14,261 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2021-06-05 22:11:14,452 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2021-06-05 22:11:14,708 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-06-05 22:11:14,887 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2021-06-05 22:11:15,156 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2021-06-05 22:11:15,527 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2021-06-05 22:11:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:15,734 INFO L93 Difference]: Finished difference Result 1545 states and 4708 transitions. [2021-06-05 22:11:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:11:15,735 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 22:11:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:15,736 INFO L225 Difference]: With dead ends: 1545 [2021-06-05 22:11:15,736 INFO L226 Difference]: Without dead ends: 1539 [2021-06-05 22:11:15,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3201.0ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:11:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-06-05 22:11:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 906. [2021-06-05 22:11:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.269613259668508) internal successors, (2959), 905 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2959 transitions. [2021-06-05 22:11:15,748 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2959 transitions. Word has length 22 [2021-06-05 22:11:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:15,748 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2959 transitions. [2021-06-05 22:11:15,748 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 22:11:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2959 transitions. [2021-06-05 22:11:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:15,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:15,750 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:15,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8830 [2021-06-05 22:11:15,950 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:15,950 INFO L82 PathProgramCache]: Analyzing trace with hash 172346182, now seen corresponding path program 700 times [2021-06-05 22:11:15,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:15,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604898855] [2021-06-05 22:11:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:16,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:16,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604898855] [2021-06-05 22:11:16,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604898855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:16,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732345106] [2021-06-05 22:11:16,128 INFO L93 rtionOrderModulation]: Changing 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 22:11:16,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:16,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:16,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:16,708 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 22:11:16,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732345106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:16,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:16,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:16,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118920816] [2021-06-05 22:11:16,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:16,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:16,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:16,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:16,709 INFO L87 Difference]: Start difference. First operand 906 states and 2959 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 22:11:17,198 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 22:11:17,413 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-06-05 22:11:17,700 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-05 22:11:17,862 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-06-05 22:11:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:17,950 INFO L93 Difference]: Finished difference Result 1269 states and 3998 transitions. [2021-06-05 22:11:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:17,950 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 22:11:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:17,952 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 22:11:17,952 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 22:11:17,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1305.7ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 22:11:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 908. [2021-06-05 22:11:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.2679162072767367) internal successors, (2964), 907 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2964 transitions. [2021-06-05 22:11:17,963 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2964 transitions. Word has length 22 [2021-06-05 22:11:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:17,963 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 2964 transitions. [2021-06-05 22:11:17,963 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 22:11:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2964 transitions. [2021-06-05 22:11:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:17,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:17,965 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:18,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8853 [2021-06-05 22:11:18,165 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash 923746620, now seen corresponding path program 701 times [2021-06-05 22:11:18,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:18,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125999373] [2021-06-05 22:11:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:18,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:18,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125999373] [2021-06-05 22:11:18,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125999373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:18,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654075893] [2021-06-05 22:11:18,366 INFO L93 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 22:11:18,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:18,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:18,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:18,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:18,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:11:18,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:18,967 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 22:11:18,967 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-06-05 22:11:18,968 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 22:11:18,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 22:11:19,017 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 22:11:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654075893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:19,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:19,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74178383] [2021-06-05 22:11:19,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:19,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:19,018 INFO L87 Difference]: Start difference. First operand 908 states and 2964 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 22:11:19,484 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-05 22:11:19,697 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-05 22:11:19,970 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2021-06-05 22:11:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:20,204 INFO L93 Difference]: Finished difference Result 1271 states and 4003 transitions. [2021-06-05 22:11:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:20,205 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 22:11:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:20,206 INFO L225 Difference]: With dead ends: 1271 [2021-06-05 22:11:20,206 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 22:11:20,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1328.7ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:11:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 22:11:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 908. [2021-06-05 22:11:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.2679162072767367) internal successors, (2964), 907 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2964 transitions. [2021-06-05 22:11:20,217 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2964 transitions. Word has length 22 [2021-06-05 22:11:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:20,218 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 2964 transitions. [2021-06-05 22:11:20,218 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 22:11:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2964 transitions. [2021-06-05 22:11:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:20,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:20,219 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:20,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8876 [2021-06-05 22:11:20,419 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2012269526, now seen corresponding path program 702 times [2021-06-05 22:11:20,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:20,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356503394] [2021-06-05 22:11:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:20,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356503394] [2021-06-05 22:11:20,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356503394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588314306] [2021-06-05 22:11:20,540 INFO L93 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 22:11:20,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:20,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:20,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:21,060 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 22:11:21,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588314306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:21,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:21,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:21,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209612948] [2021-06-05 22:11:21,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:21,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:21,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:21,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:21,061 INFO L87 Difference]: Start difference. First operand 908 states and 2964 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 22:11:21,546 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 22:11:21,820 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-05 22:11:22,028 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2021-06-05 22:11:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:22,210 INFO L93 Difference]: Finished difference Result 1269 states and 3996 transitions. [2021-06-05 22:11:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:22,210 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 22:11:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:22,212 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 22:11:22,212 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 22:11:22,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1162.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 22:11:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 902. [2021-06-05 22:11:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.2730299667036626) internal successors, (2949), 901 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2949 transitions. [2021-06-05 22:11:22,223 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2949 transitions. Word has length 22 [2021-06-05 22:11:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:22,223 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2949 transitions. [2021-06-05 22:11:22,223 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 22:11:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2949 transitions. [2021-06-05 22:11:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:22,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:22,224 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:22,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8902,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:22,424 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -464120672, now seen corresponding path program 703 times [2021-06-05 22:11:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:22,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810674474] [2021-06-05 22:11:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:22,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:22,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810674474] [2021-06-05 22:11:22,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810674474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:22,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312192094] [2021-06-05 22:11:22,570 INFO 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 22:11:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:22,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:22,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:23,117 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 22:11:23,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312192094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:23,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:23,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:23,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085311143] [2021-06-05 22:11:23,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:23,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:23,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:23,118 INFO L87 Difference]: Start difference. First operand 902 states and 2949 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 22:11:23,606 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 22:11:23,879 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 22:11:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:24,230 INFO L93 Difference]: Finished difference Result 1257 states and 3968 transitions. [2021-06-05 22:11:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:24,231 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 22:11:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:24,232 INFO L225 Difference]: With dead ends: 1257 [2021-06-05 22:11:24,232 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 22:11:24,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1146.2ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 22:11:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 896. [2021-06-05 22:11:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2782122905027933) internal successors, (2934), 895 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2934 transitions. [2021-06-05 22:11:24,243 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2934 transitions. Word has length 22 [2021-06-05 22:11:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:24,243 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2934 transitions. [2021-06-05 22:11:24,243 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 22:11:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2934 transitions. [2021-06-05 22:11:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:24,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:24,244 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:24,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8924,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:24,445 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash 287279766, now seen corresponding path program 704 times [2021-06-05 22:11:24,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:24,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090209766] [2021-06-05 22:11:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:24,584 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 22:11:24,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:24,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090209766] [2021-06-05 22:11:24,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090209766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:24,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625215918] [2021-06-05 22:11:24,584 INFO L93 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 22:11:24,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:25,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:25,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:25,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:25,145 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 22:11:25,145 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:25,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:25,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 22:11:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:25,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625215918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:25,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:25,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:25,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444814251] [2021-06-05 22:11:25,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:25,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:25,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:25,195 INFO L87 Difference]: Start difference. First operand 896 states and 2934 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 22:11:25,667 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2021-06-05 22:11:25,935 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 80 [2021-06-05 22:11:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:26,291 INFO L93 Difference]: Finished difference Result 1251 states and 3953 transitions. [2021-06-05 22:11:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:26,291 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 22:11:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:26,293 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 22:11:26,293 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 22:11:26,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1174.6ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:11:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 22:11:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 886. [2021-06-05 22:11:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.287005649717514) internal successors, (2909), 885 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2909 transitions. [2021-06-05 22:11:26,304 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2909 transitions. Word has length 22 [2021-06-05 22:11:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:26,304 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2909 transitions. [2021-06-05 22:11:26,304 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 22:11:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2909 transitions. [2021-06-05 22:11:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:26,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:26,305 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:26,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8947,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:26,505 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1562165630, now seen corresponding path program 705 times [2021-06-05 22:11:26,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:26,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11902573] [2021-06-05 22:11:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:26,644 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 22:11:26,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:26,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11902573] [2021-06-05 22:11:26,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11902573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:26,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602825174] [2021-06-05 22:11:26,644 INFO L93 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 22:11:26,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:26,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:26,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:27,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602825174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:27,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:27,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:27,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900924686] [2021-06-05 22:11:27,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:27,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:27,223 INFO L87 Difference]: Start difference. First operand 886 states and 2909 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 22:11:27,549 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 22:11:27,724 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-06-05 22:11:27,905 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-06-05 22:11:28,084 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-06-05 22:11:28,247 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-06-05 22:11:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:28,440 INFO L93 Difference]: Finished difference Result 1491 states and 4629 transitions. [2021-06-05 22:11:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:28,441 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 22:11:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:28,442 INFO L225 Difference]: With dead ends: 1491 [2021-06-05 22:11:28,442 INFO L226 Difference]: Without dead ends: 1491 [2021-06-05 22:11:28,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1235.7ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-05 22:11:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 899. [2021-06-05 22:11:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.293986636971047) internal successors, (2958), 898 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2958 transitions. [2021-06-05 22:11:28,455 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2958 transitions. Word has length 22 [2021-06-05 22:11:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:28,455 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2958 transitions. [2021-06-05 22:11:28,455 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 22:11:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2958 transitions. [2021-06-05 22:11:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:28,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:28,456 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:28,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8973 [2021-06-05 22:11:28,656 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1238893944, now seen corresponding path program 706 times [2021-06-05 22:11:28,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:28,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479709234] [2021-06-05 22:11:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:28,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:28,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479709234] [2021-06-05 22:11:28,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479709234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:28,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235503372] [2021-06-05 22:11:28,780 INFO L93 rtionOrderModulation]: Changing 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 22:11:28,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:28,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:28,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:29,319 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 22:11:29,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235503372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:29,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:29,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290318038] [2021-06-05 22:11:29,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:29,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:29,320 INFO L87 Difference]: Start difference. First operand 899 states and 2958 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 22:11:29,626 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-06-05 22:11:29,853 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-06-05 22:11:30,075 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2021-06-05 22:11:30,300 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-06-05 22:11:30,461 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2021-06-05 22:11:30,677 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-06-05 22:11:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:30,710 INFO L93 Difference]: Finished difference Result 1497 states and 4636 transitions. [2021-06-05 22:11:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:30,710 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 22:11:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:30,712 INFO L225 Difference]: With dead ends: 1497 [2021-06-05 22:11:30,712 INFO L226 Difference]: Without dead ends: 1491 [2021-06-05 22:11:30,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1458.6ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:30,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-05 22:11:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 896. [2021-06-05 22:11:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.292737430167598) internal successors, (2947), 895 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2947 transitions. [2021-06-05 22:11:30,724 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2947 transitions. Word has length 22 [2021-06-05 22:11:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:30,724 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2947 transitions. [2021-06-05 22:11:30,724 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 22:11:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2947 transitions. [2021-06-05 22:11:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:30,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:30,725 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:30,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8994 [2021-06-05 22:11:30,926 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1776749522, now seen corresponding path program 707 times [2021-06-05 22:11:30,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:30,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989034178] [2021-06-05 22:11:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:31,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:31,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989034178] [2021-06-05 22:11:31,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989034178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:31,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683227460] [2021-06-05 22:11:31,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:11:31,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:31,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:31,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:31,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:31,419 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 22:11:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:31,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683227460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:31,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:31,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:31,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705225269] [2021-06-05 22:11:31,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:31,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:31,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:31,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:31,669 INFO L87 Difference]: Start difference. First operand 896 states and 2947 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 22:11:31,972 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2021-06-05 22:11:32,141 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2021-06-05 22:11:32,327 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2021-06-05 22:11:32,503 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-05 22:11:32,655 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2021-06-05 22:11:32,814 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-06-05 22:11:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:32,834 INFO L93 Difference]: Finished difference Result 1467 states and 4573 transitions. [2021-06-05 22:11:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:32,835 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 22:11:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:32,837 INFO L225 Difference]: With dead ends: 1467 [2021-06-05 22:11:32,837 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 22:11:32,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1330.9ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 22:11:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 893. [2021-06-05 22:11:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.291479820627803) internal successors, (2936), 892 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2936 transitions. [2021-06-05 22:11:32,848 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2936 transitions. Word has length 22 [2021-06-05 22:11:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:32,848 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 2936 transitions. [2021-06-05 22:11:32,848 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 22:11:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2936 transitions. [2021-06-05 22:11:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:32,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:32,849 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:33,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 732 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9012 [2021-06-05 22:11:33,050 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1270403256, now seen corresponding path program 708 times [2021-06-05 22:11:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:33,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709227120] [2021-06-05 22:11:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:33,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:33,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709227120] [2021-06-05 22:11:33,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709227120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:33,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006130306] [2021-06-05 22:11:33,161 INFO L93 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 22:11:33,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:33,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:33,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:33,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:33,733 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 22:11:33,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006130306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:33,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:33,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:33,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796224607] [2021-06-05 22:11:33,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:33,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:33,734 INFO L87 Difference]: Start difference. First operand 893 states and 2936 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 22:11:34,060 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-06-05 22:11:34,236 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2021-06-05 22:11:34,417 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2021-06-05 22:11:34,704 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2021-06-05 22:11:34,859 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2021-06-05 22:11:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:34,879 INFO L93 Difference]: Finished difference Result 1467 states and 4570 transitions. [2021-06-05 22:11:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:34,879 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 22:11:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:34,881 INFO L225 Difference]: With dead ends: 1467 [2021-06-05 22:11:34,881 INFO L226 Difference]: Without dead ends: 1449 [2021-06-05 22:11:34,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1238.5ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-06-05 22:11:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 890. [2021-06-05 22:11:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.2902137232845896) internal successors, (2925), 889 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2925 transitions. [2021-06-05 22:11:34,893 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2925 transitions. Word has length 22 [2021-06-05 22:11:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:34,893 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 2925 transitions. [2021-06-05 22:11:34,893 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 22:11:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2925 transitions. [2021-06-05 22:11:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:34,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:34,894 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:35,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9029 [2021-06-05 22:11:35,094 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1984328242, now seen corresponding path program 709 times [2021-06-05 22:11:35,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:35,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123500848] [2021-06-05 22:11:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:35,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123500848] [2021-06-05 22:11:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123500848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246197968] [2021-06-05 22:11:35,216 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 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 22:11:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:35,857 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 22:11:35,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246197968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:35,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:35,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:35,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738167012] [2021-06-05 22:11:35,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:35,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:35,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:35,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:35,858 INFO L87 Difference]: Start difference. First operand 890 states and 2925 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 22:11:36,182 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 22:11:36,352 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-06-05 22:11:36,774 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 55 [2021-06-05 22:11:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:36,934 INFO L93 Difference]: Finished difference Result 1508 states and 4651 transitions. [2021-06-05 22:11:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:36,934 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 22:11:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:36,936 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 22:11:36,936 INFO L226 Difference]: Without dead ends: 1484 [2021-06-05 22:11:36,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1174.7ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-06-05 22:11:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 887. [2021-06-05 22:11:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.288939051918736) internal successors, (2914), 886 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2914 transitions. [2021-06-05 22:11:36,948 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2914 transitions. Word has length 22 [2021-06-05 22:11:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:36,948 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2914 transitions. [2021-06-05 22:11:36,948 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 22:11:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2914 transitions. [2021-06-05 22:11:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:36,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:36,949 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:37,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9048 [2021-06-05 22:11:37,150 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:37,150 INFO L82 PathProgramCache]: Analyzing trace with hash -423234808, now seen corresponding path program 710 times [2021-06-05 22:11:37,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:37,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166323730] [2021-06-05 22:11:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:37,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:37,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166323730] [2021-06-05 22:11:37,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166323730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:37,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992662659] [2021-06-05 22:11:37,286 INFO L93 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 22:11:37,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:37,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:37,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:37,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992662659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:37,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:37,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:37,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387893015] [2021-06-05 22:11:37,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:37,860 INFO L87 Difference]: Start difference. First operand 887 states and 2914 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 22:11:38,202 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 22:11:38,408 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-05 22:11:38,595 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2021-06-05 22:11:38,774 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-06-05 22:11:38,948 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 22:11:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:39,131 INFO L93 Difference]: Finished difference Result 1397 states and 4374 transitions. [2021-06-05 22:11:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:39,131 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 22:11:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:39,133 INFO L225 Difference]: With dead ends: 1397 [2021-06-05 22:11:39,133 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 22:11:39,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1324.1ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 22:11:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 897. [2021-06-05 22:11:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.294642857142857) internal successors, (2952), 896 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2952 transitions. [2021-06-05 22:11:39,145 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2952 transitions. Word has length 22 [2021-06-05 22:11:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:39,145 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2952 transitions. [2021-06-05 22:11:39,145 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 22:11:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2952 transitions. [2021-06-05 22:11:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:39,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:39,146 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:39,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9066,735 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:39,347 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1917142530, now seen corresponding path program 711 times [2021-06-05 22:11:39,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:39,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818180578] [2021-06-05 22:11:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:39,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:39,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818180578] [2021-06-05 22:11:39,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818180578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:39,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727695187] [2021-06-05 22:11:39,474 INFO L93 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 22:11:39,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:39,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:39,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:40,059 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 22:11:40,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727695187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:40,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:40,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:40,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360715865] [2021-06-05 22:11:40,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:40,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:40,060 INFO L87 Difference]: Start difference. First operand 897 states and 2952 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 22:11:40,398 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 22:11:40,611 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 22:11:40,803 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2021-06-05 22:11:40,990 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-06-05 22:11:41,163 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 22:11:41,355 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-06-05 22:11:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:41,384 INFO L93 Difference]: Finished difference Result 1403 states and 4381 transitions. [2021-06-05 22:11:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:41,385 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 22:11:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:41,387 INFO L225 Difference]: With dead ends: 1403 [2021-06-05 22:11:41,387 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 22:11:41,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1355.4ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 22:11:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 894. [2021-06-05 22:11:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.2933930571108623) internal successors, (2941), 893 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2941 transitions. [2021-06-05 22:11:41,399 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2941 transitions. Word has length 22 [2021-06-05 22:11:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:41,399 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 2941 transitions. [2021-06-05 22:11:41,399 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 22:11:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2941 transitions. [2021-06-05 22:11:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:41,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:41,400 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:41,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9087,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:41,600 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1379286952, now seen corresponding path program 712 times [2021-06-05 22:11:41,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:41,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455297410] [2021-06-05 22:11:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:41,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:41,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455297410] [2021-06-05 22:11:41,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455297410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:41,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890096737] [2021-06-05 22:11:41,737 INFO L93 rtionOrderModulation]: Changing 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 22:11:41,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:41,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:41,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:42,094 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 22:11:42,393 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 22:11:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890096737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:42,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:42,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118247535] [2021-06-05 22:11:42,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:42,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:42,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:42,394 INFO L87 Difference]: Start difference. First operand 894 states and 2941 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 22:11:42,728 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 22:11:42,937 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 22:11:43,195 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2021-06-05 22:11:43,382 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 22:11:43,535 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 50 [2021-06-05 22:11:43,711 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 22:11:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:43,725 INFO L93 Difference]: Finished difference Result 1367 states and 4299 transitions. [2021-06-05 22:11:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:43,726 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 22:11:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:43,728 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 22:11:43,728 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 22:11:43,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1478.3ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 22:11:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 891. [2021-06-05 22:11:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.292134831460674) internal successors, (2930), 890 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2930 transitions. [2021-06-05 22:11:43,739 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2930 transitions. Word has length 22 [2021-06-05 22:11:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:43,739 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 2930 transitions. [2021-06-05 22:11:43,739 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 22:11:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2930 transitions. [2021-06-05 22:11:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:43,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:43,740 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:43,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9106,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:43,941 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1885633218, now seen corresponding path program 713 times [2021-06-05 22:11:43,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:43,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220818920] [2021-06-05 22:11:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:44,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:44,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220818920] [2021-06-05 22:11:44,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220818920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:44,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158512433] [2021-06-05 22:11:44,088 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 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 22:11:44,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:44,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:44,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:44,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:44,463 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 22:11:44,741 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 22:11:44,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158512433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:44,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:44,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:44,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370757047] [2021-06-05 22:11:44,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:44,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:44,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:44,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:44,742 INFO L87 Difference]: Start difference. First operand 891 states and 2930 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 22:11:45,099 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 22:11:45,314 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 22:11:45,513 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 79 [2021-06-05 22:11:45,679 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2021-06-05 22:11:45,834 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-06-05 22:11:45,999 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-05 22:11:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:46,013 INFO L93 Difference]: Finished difference Result 1364 states and 4288 transitions. [2021-06-05 22:11:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:46,014 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 22:11:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:46,015 INFO L225 Difference]: With dead ends: 1364 [2021-06-05 22:11:46,015 INFO L226 Difference]: Without dead ends: 1346 [2021-06-05 22:11:46,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1393.4ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-06-05 22:11:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 888. [2021-06-05 22:11:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.2908680947012403) internal successors, (2919), 887 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2919 transitions. [2021-06-05 22:11:46,026 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2919 transitions. Word has length 22 [2021-06-05 22:11:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:46,027 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2919 transitions. [2021-06-05 22:11:46,027 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 22:11:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2919 transitions. [2021-06-05 22:11:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:46,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:46,028 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:46,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9128 [2021-06-05 22:11:46,228 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash 118080382, now seen corresponding path program 714 times [2021-06-05 22:11:46,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:46,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636976193] [2021-06-05 22:11:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636976193] [2021-06-05 22:11:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636976193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593122758] [2021-06-05 22:11:46,382 INFO L93 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 22:11:46,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:11:46,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:47,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593122758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:47,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:47,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:47,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081328056] [2021-06-05 22:11:47,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:47,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:47,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:47,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:47,039 INFO L87 Difference]: Start difference. First operand 888 states and 2919 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 22:11:47,353 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-06-05 22:11:47,562 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 22:11:47,782 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-05 22:11:48,032 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 81 [2021-06-05 22:11:48,217 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-06-05 22:11:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:48,400 INFO L93 Difference]: Finished difference Result 1394 states and 4363 transitions. [2021-06-05 22:11:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:48,400 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 22:11:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:48,402 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 22:11:48,402 INFO L226 Difference]: Without dead ends: 1394 [2021-06-05 22:11:48,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1487.1ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-05 22:11:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 895. [2021-06-05 22:11:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.295302013422819) internal successors, (2946), 894 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2946 transitions. [2021-06-05 22:11:48,414 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2946 transitions. Word has length 22 [2021-06-05 22:11:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:48,414 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 2946 transitions. [2021-06-05 22:11:48,414 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 22:11:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2946 transitions. [2021-06-05 22:11:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:48,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:48,415 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:48,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 739 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9148 [2021-06-05 22:11:48,616 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1375827340, now seen corresponding path program 715 times [2021-06-05 22:11:48,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:48,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597909428] [2021-06-05 22:11:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:48,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:48,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597909428] [2021-06-05 22:11:48,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597909428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:48,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072414994] [2021-06-05 22:11:48,768 INFO 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 22:11:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:49,432 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 22:11:49,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072414994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:49,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:49,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:49,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599909912] [2021-06-05 22:11:49,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:49,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:49,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:49,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:49,433 INFO L87 Difference]: Start difference. First operand 895 states and 2946 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 22:11:49,739 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 22:11:49,941 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 22:11:50,159 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2021-06-05 22:11:50,398 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 81 [2021-06-05 22:11:50,580 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 22:11:50,776 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 22:11:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:50,805 INFO L93 Difference]: Finished difference Result 1400 states and 4370 transitions. [2021-06-05 22:11:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:50,806 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 22:11:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:50,807 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 22:11:50,808 INFO L226 Difference]: Without dead ends: 1394 [2021-06-05 22:11:50,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1526.8ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-05 22:11:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 892. [2021-06-05 22:11:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.294051627384961) internal successors, (2935), 891 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2935 transitions. [2021-06-05 22:11:50,819 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2935 transitions. Word has length 22 [2021-06-05 22:11:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:50,819 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2935 transitions. [2021-06-05 22:11:50,819 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 22:11:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2935 transitions. [2021-06-05 22:11:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:50,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:50,820 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:51,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9164 [2021-06-05 22:11:51,021 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash -837971762, now seen corresponding path program 716 times [2021-06-05 22:11:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:51,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657241855] [2021-06-05 22:11:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:51,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:51,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657241855] [2021-06-05 22:11:51,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657241855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:51,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965699148] [2021-06-05 22:11:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:11:51,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:51,842 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 22:11:51,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965699148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:51,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:51,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:51,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460433001] [2021-06-05 22:11:51,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:51,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:51,843 INFO L87 Difference]: Start difference. First operand 892 states and 2935 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 22:11:52,159 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-06-05 22:11:52,365 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 22:11:52,584 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2021-06-05 22:11:52,831 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2021-06-05 22:11:53,046 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 57 [2021-06-05 22:11:53,221 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-06-05 22:11:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,235 INFO L93 Difference]: Finished difference Result 1364 states and 4288 transitions. [2021-06-05 22:11:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:53,235 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 22:11:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,237 INFO L225 Difference]: With dead ends: 1364 [2021-06-05 22:11:53,237 INFO L226 Difference]: Without dead ends: 1352 [2021-06-05 22:11:53,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1548.5ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-05 22:11:53,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 889. [2021-06-05 22:11:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.2927927927927927) internal successors, (2924), 888 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2924 transitions. [2021-06-05 22:11:53,248 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2924 transitions. Word has length 22 [2021-06-05 22:11:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,249 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2924 transitions. [2021-06-05 22:11:53,249 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 22:11:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2924 transitions. [2021-06-05 22:11:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:53,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,250 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9184,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:53,450 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1936657480, now seen corresponding path program 717 times [2021-06-05 22:11:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162276603] [2021-06-05 22:11:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:53,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:53,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162276603] [2021-06-05 22:11:53,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162276603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:53,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622470479] [2021-06-05 22:11:53,601 INFO L93 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 22:11:53,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:53,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:53,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:11:53,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:54,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:54,090 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 22:11:54,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:54,103 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 23 treesize of output 23 [2021-06-05 22:11:54,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 22:11:54,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 22:11:54,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,127 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 17 treesize of output 9 [2021-06-05 22:11:54,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,131 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 17 treesize of output 9 [2021-06-05 22:11:54,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,143 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 22:11:54,144 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-06-05 22:11:54,145 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,149 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 7 treesize of output 3 [2021-06-05 22:11:54,150 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:54,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:11:54,155 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:54,159 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,163 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 7 treesize of output 3 [2021-06-05 22:11:54,164 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:54,168 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,299 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 22:11:54,299 INFO L628 ElimStorePlain]: treesize reduction 66, result has 68.4 percent of original size [2021-06-05 22:11:54,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:11:54,301 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:402, output treesize:134 [2021-06-05 22:11:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:54,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622470479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:54,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:54,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:11:54,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926560270] [2021-06-05 22:11:54,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:11:54,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:54,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:11:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:54,513 INFO L87 Difference]: Start difference. First operand 889 states and 2924 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 22:11:55,190 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 22:11:55,423 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-05 22:11:55,656 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 22:11:55,816 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-05 22:11:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:55,843 INFO L93 Difference]: Finished difference Result 1484 states and 4582 transitions. [2021-06-05 22:11:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:55,844 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 22:11:55,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:55,845 INFO L225 Difference]: With dead ends: 1484 [2021-06-05 22:11:55,846 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 22:11:55,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1512.1ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:11:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 22:11:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 897. [2021-06-05 22:11:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.3035714285714284) internal successors, (2960), 896 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2960 transitions. [2021-06-05 22:11:55,858 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2960 transitions. Word has length 22 [2021-06-05 22:11:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:55,858 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2960 transitions. [2021-06-05 22:11:55,858 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 22:11:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2960 transitions. [2021-06-05 22:11:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:55,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:55,859 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:56,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 742 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9203 [2021-06-05 22:11:56,060 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash 442749758, now seen corresponding path program 718 times [2021-06-05 22:11:56,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:56,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665957852] [2021-06-05 22:11:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:56,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:56,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665957852] [2021-06-05 22:11:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665957852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:56,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086547459] [2021-06-05 22:11:56,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:11:56,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:56,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:56,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:56,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:56,552 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 22:11:56,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:56,767 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 8 treesize of output 1 [2021-06-05 22:11:56,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:56,800 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 22:11:56,800 INFO L518 ElimStorePlain]: Eliminatee v_prenex_568 vanished before elimination [2021-06-05 22:11:56,801 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 22:11:56,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:11:56,876 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 22:11:56,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086547459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:56,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:56,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:56,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443810882] [2021-06-05 22:11:56,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:56,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:56,877 INFO L87 Difference]: Start difference. First operand 897 states and 2960 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 22:11:57,198 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 22:11:57,401 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 22:11:57,609 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2021-06-05 22:11:57,802 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-05 22:11:57,984 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2021-06-05 22:11:58,180 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2021-06-05 22:11:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:58,221 INFO L93 Difference]: Finished difference Result 1469 states and 4530 transitions. [2021-06-05 22:11:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:58,221 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 22:11:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:58,224 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 22:11:58,224 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 22:11:58,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1454.3ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 22:11:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 894. [2021-06-05 22:11:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.3023516237402015) internal successors, (2949), 893 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2949 transitions. [2021-06-05 22:11:58,237 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2949 transitions. Word has length 22 [2021-06-05 22:11:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:58,237 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 2949 transitions. [2021-06-05 22:11:58,237 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 22:11:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2949 transitions. [2021-06-05 22:11:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:11:58,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:58,238 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:58,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9236,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:58,438 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1606909378, now seen corresponding path program 719 times [2021-06-05 22:11:58,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:58,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235193190] [2021-06-05 22:11:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:58,589 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 22:11:58,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:58,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235193190] [2021-06-05 22:11:58,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235193190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:58,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770104357] [2021-06-05 22:11:58,589 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 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 22:11:58,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:58,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:58,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:11:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:59,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:59,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:59,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,158 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 22:11:59,158 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:59,159 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 22:11:59,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:11:59,240 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 22:11:59,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770104357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:59,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:59,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:11:59,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799858066] [2021-06-05 22:11:59,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:59,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:59,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:59,241 INFO L87 Difference]: Start difference. First operand 894 states and 2949 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 22:11:59,551 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-06-05 22:11:59,757 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2021-06-05 22:11:59,978 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-06-05 22:12:00,182 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-05 22:12:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,625 INFO L93 Difference]: Finished difference Result 1437 states and 4465 transitions. [2021-06-05 22:12:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:00,625 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 22:12:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,627 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 22:12:00,627 INFO L226 Difference]: Without dead ends: 1437 [2021-06-05 22:12:00,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1431.1ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:12:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-05 22:12:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 890. [2021-06-05 22:12:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.294713160854893) internal successors, (2929), 889 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2929 transitions. [2021-06-05 22:12:00,639 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2929 transitions. Word has length 22 [2021-06-05 22:12:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,639 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 2929 transitions. [2021-06-05 22:12:00,639 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 22:12:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2929 transitions. [2021-06-05 22:12:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:00,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,640 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9252,744 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:00,841 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1586172850, now seen corresponding path program 720 times [2021-06-05 22:12:00,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496290847] [2021-06-05 22:12:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:00,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496290847] [2021-06-05 22:12:00,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496290847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:00,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161435305] [2021-06-05 22:12:00,984 INFO L93 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 22:12:01,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:01,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:01,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:01,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:01,554 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 22:12:01,554 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:01,554 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 22:12:01,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 22:12:01,629 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 22:12:01,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161435305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:01,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:01,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:01,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872423688] [2021-06-05 22:12:01,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:01,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:01,629 INFO L87 Difference]: Start difference. First operand 890 states and 2929 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 22:12:01,917 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-05 22:12:02,113 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 22:12:02,325 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-05 22:12:02,518 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 22:12:02,717 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-06-05 22:12:02,895 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 22:12:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,010 INFO L93 Difference]: Finished difference Result 1414 states and 4412 transitions. [2021-06-05 22:12:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:03,010 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 22:12:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,012 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 22:12:03,012 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 22:12:03,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1480.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:12:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 22:12:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 892. [2021-06-05 22:12:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.292929292929293) internal successors, (2934), 891 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2934 transitions. [2021-06-05 22:12:03,023 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2934 transitions. Word has length 22 [2021-06-05 22:12:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,023 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2934 transitions. [2021-06-05 22:12:03,023 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 22:12:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2934 transitions. [2021-06-05 22:12:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:03,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,024 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:03,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9269 [2021-06-05 22:12:03,225 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 689936830, now seen corresponding path program 721 times [2021-06-05 22:12:03,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:03,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639641012] [2021-06-05 22:12:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:03,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:03,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639641012] [2021-06-05 22:12:03,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639641012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:03,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326503076] [2021-06-05 22:12:03,393 INFO 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 22:12:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:03,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:03,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:04,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326503076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:04,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:04,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:04,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295966303] [2021-06-05 22:12:04,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:04,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:04,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:04,042 INFO L87 Difference]: Start difference. First operand 892 states and 2934 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 22:12:04,362 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-05 22:12:04,567 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 22:12:04,790 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 22:12:05,004 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-06-05 22:12:05,161 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 53 [2021-06-05 22:12:05,333 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 22:12:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:05,348 INFO L93 Difference]: Finished difference Result 1362 states and 4289 transitions. [2021-06-05 22:12:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:05,349 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 22:12:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:05,350 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 22:12:05,350 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 22:12:05,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1445.9ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 22:12:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 894. [2021-06-05 22:12:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.2911534154535276) internal successors, (2939), 893 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2939 transitions. [2021-06-05 22:12:05,362 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2939 transitions. Word has length 22 [2021-06-05 22:12:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:05,362 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 2939 transitions. [2021-06-05 22:12:05,362 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 22:12:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2939 transitions. [2021-06-05 22:12:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:05,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:05,363 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:05,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 746 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9286 [2021-06-05 22:12:05,563 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1441337268, now seen corresponding path program 722 times [2021-06-05 22:12:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:05,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457220513] [2021-06-05 22:12:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:05,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:05,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457220513] [2021-06-05 22:12:05,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457220513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:05,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50989209] [2021-06-05 22:12:05,732 INFO L93 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 22:12:05,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:05,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:05,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:05,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:06,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:06,288 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 8 treesize of output 1 [2021-06-05 22:12:06,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:06,303 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 22:12:06,303 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:06,304 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 22:12:06,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 22:12:06,350 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 22:12:06,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50989209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:06,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:06,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:06,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527322754] [2021-06-05 22:12:06,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:06,351 INFO L87 Difference]: Start difference. First operand 894 states and 2939 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 22:12:06,710 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 22:12:06,928 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 22:12:07,158 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-05 22:12:07,370 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2021-06-05 22:12:07,558 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2021-06-05 22:12:07,835 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 22:12:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:07,945 INFO L93 Difference]: Finished difference Result 1364 states and 4296 transitions. [2021-06-05 22:12:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:07,946 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 22:12:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:07,948 INFO L225 Difference]: With dead ends: 1364 [2021-06-05 22:12:07,948 INFO L226 Difference]: Without dead ends: 1358 [2021-06-05 22:12:07,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1607.3ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:12:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-06-05 22:12:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 894. [2021-06-05 22:12:07,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.2911534154535276) internal successors, (2939), 893 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2939 transitions. [2021-06-05 22:12:07,959 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2939 transitions. Word has length 22 [2021-06-05 22:12:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:07,959 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 2939 transitions. [2021-06-05 22:12:07,959 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 22:12:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2939 transitions. [2021-06-05 22:12:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:07,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:07,960 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:08,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9304,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:08,161 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1765107122, now seen corresponding path program 723 times [2021-06-05 22:12:08,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:08,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834440403] [2021-06-05 22:12:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:08,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:08,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834440403] [2021-06-05 22:12:08,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834440403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:08,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992570242] [2021-06-05 22:12:08,284 INFO L93 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 22:12:08,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:12:08,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:08,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:08,878 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 22:12:08,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992570242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:08,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:08,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:08,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427662439] [2021-06-05 22:12:08,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:08,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:08,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:08,879 INFO L87 Difference]: Start difference. First operand 894 states and 2939 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 22:12:09,225 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-05 22:12:09,437 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 22:12:09,720 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-06-05 22:12:09,875 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 52 [2021-06-05 22:12:10,029 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-06-05 22:12:10,195 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 22:12:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:10,210 INFO L93 Difference]: Finished difference Result 1364 states and 4294 transitions. [2021-06-05 22:12:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:10,210 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 22:12:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:10,212 INFO L225 Difference]: With dead ends: 1364 [2021-06-05 22:12:10,212 INFO L226 Difference]: Without dead ends: 1346 [2021-06-05 22:12:10,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1395.2ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-06-05 22:12:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 896. [2021-06-05 22:12:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2893854748603353) internal successors, (2944), 895 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2944 transitions. [2021-06-05 22:12:10,223 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2944 transitions. Word has length 22 [2021-06-05 22:12:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:10,224 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2944 transitions. [2021-06-05 22:12:10,224 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 22:12:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2944 transitions. [2021-06-05 22:12:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:10,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:10,225 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:10,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 748 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9334 [2021-06-05 22:12:10,425 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:10,425 INFO L82 PathProgramCache]: Analyzing trace with hash 53469976, now seen corresponding path program 724 times [2021-06-05 22:12:10,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:10,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157791623] [2021-06-05 22:12:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:10,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157791623] [2021-06-05 22:12:10,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157791623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636202498] [2021-06-05 22:12:10,572 INFO L93 rtionOrderModulation]: Changing 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 22:12:10,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:10,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:10,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:11,198 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 22:12:11,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636202498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:11,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:11,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:11,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647155038] [2021-06-05 22:12:11,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:11,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:11,198 INFO L87 Difference]: Start difference. First operand 896 states and 2944 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 22:12:11,526 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 22:12:11,744 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-06-05 22:12:12,030 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2021-06-05 22:12:12,216 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2021-06-05 22:12:12,370 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2021-06-05 22:12:12,555 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 22:12:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:12,569 INFO L93 Difference]: Finished difference Result 1360 states and 4286 transitions. [2021-06-05 22:12:12,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:12,570 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 22:12:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:12,571 INFO L225 Difference]: With dead ends: 1360 [2021-06-05 22:12:12,571 INFO L226 Difference]: Without dead ends: 1348 [2021-06-05 22:12:12,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1478.6ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-05 22:12:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 898. [2021-06-05 22:12:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.2876254180602005) internal successors, (2949), 897 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2949 transitions. [2021-06-05 22:12:12,583 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2949 transitions. Word has length 22 [2021-06-05 22:12:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:12,583 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 2949 transitions. [2021-06-05 22:12:12,583 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 22:12:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2949 transitions. [2021-06-05 22:12:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:12,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:12,584 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:12,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9351,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:12,785 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:12,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash 804870414, now seen corresponding path program 725 times [2021-06-05 22:12:12,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:12,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20470153] [2021-06-05 22:12:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:12,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:12,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20470153] [2021-06-05 22:12:12,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20470153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:12,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155175594] [2021-06-05 22:12:12,957 INFO L93 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 22:12:13,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:12:13,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:13,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:13,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:13,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:13,650 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 22:12:13,650 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:13,650 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 22:12:13,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 22:12:13,710 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 22:12:13,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155175594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:13,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:13,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:13,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646357812] [2021-06-05 22:12:13,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:13,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:13,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:13,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:13,711 INFO L87 Difference]: Start difference. First operand 898 states and 2949 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 22:12:14,138 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 22:12:14,410 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 22:12:14,768 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2021-06-05 22:12:15,092 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-06-05 22:12:15,314 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 22:12:15,542 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-05 22:12:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:15,647 INFO L93 Difference]: Finished difference Result 1362 states and 4293 transitions. [2021-06-05 22:12:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:15,647 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 22:12:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:15,649 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 22:12:15,649 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 22:12:15,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1999.6ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:12:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 22:12:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 896. [2021-06-05 22:12:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2893854748603353) internal successors, (2944), 895 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2944 transitions. [2021-06-05 22:12:15,660 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2944 transitions. Word has length 22 [2021-06-05 22:12:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:15,661 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2944 transitions. [2021-06-05 22:12:15,661 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 22:12:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2944 transitions. [2021-06-05 22:12:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:15,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:15,662 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:15,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9376 [2021-06-05 22:12:15,862 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1751980734, now seen corresponding path program 726 times [2021-06-05 22:12:15,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:15,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174071306] [2021-06-05 22:12:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:15,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:15,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174071306] [2021-06-05 22:12:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174071306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:15,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632348117] [2021-06-05 22:12:15,995 INFO L93 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 22:12:16,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:16,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:16,631 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 22:12:16,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632348117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:16,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:16,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:16,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142543015] [2021-06-05 22:12:16,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:16,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:16,632 INFO L87 Difference]: Start difference. First operand 896 states and 2944 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 22:12:17,079 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 22:12:17,334 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-05 22:12:17,538 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2021-06-05 22:12:17,736 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2021-06-05 22:12:17,934 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-05 22:12:18,114 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2021-06-05 22:12:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:18,146 INFO L93 Difference]: Finished difference Result 1399 states and 4363 transitions. [2021-06-05 22:12:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:18,147 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 22:12:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:18,149 INFO L225 Difference]: With dead ends: 1399 [2021-06-05 22:12:18,149 INFO L226 Difference]: Without dead ends: 1375 [2021-06-05 22:12:18,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1485.0ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-05 22:12:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 898. [2021-06-05 22:12:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.2876254180602005) internal successors, (2949), 897 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2949 transitions. [2021-06-05 22:12:18,166 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2949 transitions. Word has length 22 [2021-06-05 22:12:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:18,166 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 2949 transitions. [2021-06-05 22:12:18,166 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 22:12:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2949 transitions. [2021-06-05 22:12:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:18,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:18,167 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:18,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9406,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:18,389 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:18,389 INFO L82 PathProgramCache]: Analyzing trace with hash -289489544, now seen corresponding path program 727 times [2021-06-05 22:12:18,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:18,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613839679] [2021-06-05 22:12:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:18,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:18,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613839679] [2021-06-05 22:12:18,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613839679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:18,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475537113] [2021-06-05 22:12:18,576 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 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 22:12:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:18,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:19,155 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 22:12:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475537113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:19,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:19,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:19,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982359554] [2021-06-05 22:12:19,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:19,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:19,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:19,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:19,156 INFO L87 Difference]: Start difference. First operand 898 states and 2949 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 22:12:19,501 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 22:12:19,701 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 22:12:19,899 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 22:12:20,056 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2021-06-05 22:12:20,204 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2021-06-05 22:12:20,370 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-05 22:12:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:20,392 INFO L93 Difference]: Finished difference Result 1352 states and 4264 transitions. [2021-06-05 22:12:20,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:20,392 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 22:12:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:20,394 INFO L225 Difference]: With dead ends: 1352 [2021-06-05 22:12:20,394 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 22:12:20,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1310.8ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 22:12:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 900. [2021-06-05 22:12:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.28587319243604) internal successors, (2954), 899 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2954 transitions. [2021-06-05 22:12:20,405 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2954 transitions. Word has length 22 [2021-06-05 22:12:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:20,406 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2954 transitions. [2021-06-05 22:12:20,406 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 22:12:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2954 transitions. [2021-06-05 22:12:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:20,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:20,407 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:20,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9423 [2021-06-05 22:12:20,607 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1529087554, now seen corresponding path program 728 times [2021-06-05 22:12:20,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:20,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788543358] [2021-06-05 22:12:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:20,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788543358] [2021-06-05 22:12:20,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788543358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587180857] [2021-06-05 22:12:20,764 INFO L93 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 22:12:20,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:20,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:20,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:20,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:21,134 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 22:12:21,392 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 22:12:21,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587180857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:21,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:21,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:21,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298137112] [2021-06-05 22:12:21,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:21,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:21,393 INFO L87 Difference]: Start difference. First operand 900 states and 2954 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 22:12:21,769 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 22:12:21,982 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 22:12:22,183 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 22:12:22,382 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-05 22:12:22,542 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-06-05 22:12:22,714 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-05 22:12:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:22,735 INFO L93 Difference]: Finished difference Result 1346 states and 4249 transitions. [2021-06-05 22:12:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:22,735 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 22:12:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:22,737 INFO L225 Difference]: With dead ends: 1346 [2021-06-05 22:12:22,737 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 22:12:22,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1406.9ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 22:12:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 902. [2021-06-05 22:12:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.284128745837958) internal successors, (2959), 901 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2959 transitions. [2021-06-05 22:12:22,749 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2959 transitions. Word has length 22 [2021-06-05 22:12:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:22,749 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2959 transitions. [2021-06-05 22:12:22,749 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 22:12:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2959 transitions. [2021-06-05 22:12:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:22,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:22,750 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:22,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9447,753 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:22,950 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:22,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2014479304, now seen corresponding path program 729 times [2021-06-05 22:12:22,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:22,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524884800] [2021-06-05 22:12:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524884800] [2021-06-05 22:12:23,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524884800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:23,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005030971] [2021-06-05 22:12:23,084 INFO L93 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 22:12:23,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:12:23,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:23,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:12:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:23,724 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 22:12:23,724 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-06-05 22:12:23,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:12:23,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:23,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:23,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 22:12:23,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:12:23,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:23,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:12:23,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:23,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 22:12:23,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:23,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:23,996 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 22:12:23,996 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:207, output treesize:81 [2021-06-05 22:12:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:24,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005030971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:24,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:24,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:12:24,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948376382] [2021-06-05 22:12:24,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:24,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:24,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:24,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:24,125 INFO L87 Difference]: Start difference. First operand 902 states and 2959 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 22:12:24,421 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 22:12:25,012 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-06-05 22:12:25,231 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-05 22:12:25,376 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-06-05 22:12:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:25,403 INFO L93 Difference]: Finished difference Result 1390 states and 4349 transitions. [2021-06-05 22:12:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:25,403 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 22:12:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:25,405 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 22:12:25,405 INFO L226 Difference]: Without dead ends: 1363 [2021-06-05 22:12:25,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1499.8ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:12:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-06-05 22:12:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 904. [2021-06-05 22:12:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.2823920265780733) internal successors, (2964), 903 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2964 transitions. [2021-06-05 22:12:25,417 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2964 transitions. Word has length 22 [2021-06-05 22:12:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:25,417 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2964 transitions. [2021-06-05 22:12:25,417 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 22:12:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2964 transitions. [2021-06-05 22:12:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:25,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:25,418 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:25,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 754 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9472 [2021-06-05 22:12:25,618 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash 365064066, now seen corresponding path program 730 times [2021-06-05 22:12:25,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:25,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625907990] [2021-06-05 22:12:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:25,755 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 22:12:25,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:25,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625907990] [2021-06-05 22:12:25,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625907990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:25,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666359827] [2021-06-05 22:12:25,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:12:25,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:25,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:26,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:26,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:26,262 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 22:12:26,262 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:26,263 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 22:12:26,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 22:12:26,310 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 22:12:26,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666359827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:26,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:26,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 22:12:26,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964634010] [2021-06-05 22:12:26,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:26,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:26,310 INFO L87 Difference]: Start difference. First operand 904 states and 2964 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 22:12:26,607 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 22:12:26,851 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 22:12:27,037 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 22:12:27,283 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-06-05 22:12:27,525 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 22:12:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:27,640 INFO L93 Difference]: Finished difference Result 1340 states and 4240 transitions. [2021-06-05 22:12:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:27,640 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 22:12:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:27,642 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 22:12:27,642 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 22:12:27,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1409.1ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 22:12:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 898. [2021-06-05 22:12:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.2876254180602005) internal successors, (2949), 897 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2949 transitions. [2021-06-05 22:12:27,653 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2949 transitions. Word has length 22 [2021-06-05 22:12:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:27,653 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 2949 transitions. [2021-06-05 22:12:27,653 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 22:12:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2949 transitions. [2021-06-05 22:12:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:27,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:27,654 INFO L554 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 22:12:27,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 755 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9511 [2021-06-05 22:12:27,855 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash -980141187, now seen corresponding path program 23 times [2021-06-05 22:12:27,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:27,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486959234] [2021-06-05 22:12:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:27,940 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 22:12:27,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:27,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486959234] [2021-06-05 22:12:27,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486959234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:27,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895647424] [2021-06-05 22:12:27,940 INFO L93 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 22:12:28,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:12:28,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:12:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:28,223 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 22:12:28,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895647424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:28,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:28,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:12:28,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254773369] [2021-06-05 22:12:28,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:28,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:28,224 INFO L87 Difference]: Start difference. First operand 898 states and 2949 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 22:12:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:28,700 INFO L93 Difference]: Finished difference Result 1181 states and 3673 transitions. [2021-06-05 22:12:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:12:28,700 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 22 [2021-06-05 22:12:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:28,701 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 22:12:28,701 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 22:12:28,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:12:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 22:12:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 926. [2021-06-05 22:12:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.2745945945945945) internal successors, (3029), 925 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3029 transitions. [2021-06-05 22:12:28,713 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3029 transitions. Word has length 22 [2021-06-05 22:12:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:28,713 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3029 transitions. [2021-06-05 22:12:28,713 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 22:12:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3029 transitions. [2021-06-05 22:12:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:28,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:28,714 INFO L554 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 22:12:28,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9540,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:28,914 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash -271782969, now seen corresponding path program 24 times [2021-06-05 22:12:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:28,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472623568] [2021-06-05 22:12:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:28,974 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 22:12:28,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:28,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472623568] [2021-06-05 22:12:28,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472623568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:28,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135761317] [2021-06-05 22:12:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 22:12:29,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:12:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:29,224 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 22:12:29,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135761317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:29,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:29,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:12:29,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327243264] [2021-06-05 22:12:29,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:29,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:29,225 INFO L87 Difference]: Start difference. First operand 926 states and 3029 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 22:12:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:29,720 INFO L93 Difference]: Finished difference Result 1180 states and 3669 transitions. [2021-06-05 22:12:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:12:29,720 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 22 [2021-06-05 22:12:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:29,722 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 22:12:29,722 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 22:12:29,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:12:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 22:12:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 923. [2021-06-05 22:12:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.2733188720173536) internal successors, (3018), 922 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3018 transitions. [2021-06-05 22:12:29,733 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3018 transitions. Word has length 22 [2021-06-05 22:12:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:29,733 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3018 transitions. [2021-06-05 22:12:29,733 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 22:12:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3018 transitions. [2021-06-05 22:12:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:29,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:29,734 INFO L554 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 22:12:29,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9547,757 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:29,935 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1916400207, now seen corresponding path program 25 times [2021-06-05 22:12:29,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:29,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685133921] [2021-06-05 22:12:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:29,988 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 22:12:29,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:29,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685133921] [2021-06-05 22:12:29,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685133921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:29,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230026124] [2021-06-05 22:12:29,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 22:12:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:12:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:30,244 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 22:12:30,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230026124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:30,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:30,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:12:30,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129546445] [2021-06-05 22:12:30,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:12:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:12:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:12:30,245 INFO L87 Difference]: Start difference. First operand 923 states and 3018 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 22:12:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:30,636 INFO L93 Difference]: Finished difference Result 1157 states and 3621 transitions. [2021-06-05 22:12:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:12:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:30,638 INFO L225 Difference]: With dead ends: 1157 [2021-06-05 22:12:30,638 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 22:12:30,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 22:12:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 920. [2021-06-05 22:12:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.2720348204570184) internal successors, (3007), 919 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3007 transitions. [2021-06-05 22:12:30,648 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3007 transitions. Word has length 22 [2021-06-05 22:12:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:30,648 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3007 transitions. [2021-06-05 22:12:30,648 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 22:12:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3007 transitions. [2021-06-05 22:12:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:30,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:30,649 INFO L554 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 22:12:30,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 758 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9554 [2021-06-05 22:12:30,850 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:30,850 INFO L82 PathProgramCache]: Analyzing trace with hash 587702787, now seen corresponding path program 26 times [2021-06-05 22:12:30,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:30,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569741440] [2021-06-05 22:12:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:30,900 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 22:12:30,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569741440] [2021-06-05 22:12:30,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569741440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:30,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744793943] [2021-06-05 22:12:30,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 22:12:31,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:31,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:31,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:12:31,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:31,147 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 22:12:31,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744793943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:31,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:31,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:12:31,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005802670] [2021-06-05 22:12:31,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:12:31,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:31,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:12:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:12:31,148 INFO L87 Difference]: Start difference. First operand 920 states and 3007 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 22:12:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:31,415 INFO L93 Difference]: Finished difference Result 1132 states and 3552 transitions. [2021-06-05 22:12:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:12:31,415 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 22 [2021-06-05 22:12:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:31,416 INFO L225 Difference]: With dead ends: 1132 [2021-06-05 22:12:31,416 INFO L226 Difference]: Without dead ends: 1092 [2021-06-05 22:12:31,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:12:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-06-05 22:12:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 888. [2021-06-05 22:12:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.303269447576099) internal successors, (2930), 887 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2930 transitions. [2021-06-05 22:12:31,426 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2930 transitions. Word has length 22 [2021-06-05 22:12:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:31,426 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2930 transitions. [2021-06-05 22:12:31,426 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 22:12:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2930 transitions. [2021-06-05 22:12:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:31,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:31,427 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:31,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9558 [2021-06-05 22:12:31,628 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1136107555, now seen corresponding path program 731 times [2021-06-05 22:12:31,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:31,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415624924] [2021-06-05 22:12:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:31,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415624924] [2021-06-05 22:12:31,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415624924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:31,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348899766] [2021-06-05 22:12:31,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 22:12:31,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:12:31,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:31,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:31,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:32,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:32,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:32,019 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 15 treesize of output 1 [2021-06-05 22:12:32,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:32,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:32,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:32,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:32,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:32,065 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.7 percent of original size [2021-06-05 22:12:32,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:32,066 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:96, output treesize:15 [2021-06-05 22:12:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:32,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348899766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:32,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:32,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 22:12:32,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455410503] [2021-06-05 22:12:32,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:32,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:32,113 INFO L87 Difference]: Start difference. First operand 888 states and 2930 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 22:12:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:32,459 INFO L93 Difference]: Finished difference Result 1253 states and 3994 transitions. [2021-06-05 22:12:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:12:32,459 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 22:12:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:32,460 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 22:12:32,460 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 22:12:32,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 22:12:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 913. [2021-06-05 22:12:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 3.3157894736842106) internal successors, (3024), 912 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 3024 transitions. [2021-06-05 22:12:32,470 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 3024 transitions. Word has length 22 [2021-06-05 22:12:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:32,470 INFO L482 AbstractCegarLoop]: Abstraction has 913 states and 3024 transitions. [2021-06-05 22:12:32,470 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 22:12:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 3024 transitions. [2021-06-05 22:12:32,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:32,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:32,471 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:32,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 760 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9562 [2021-06-05 22:12:32,672 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:32,672 INFO L82 PathProgramCache]: Analyzing trace with hash 483030302, now seen corresponding path program 732 times [2021-06-05 22:12:32,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:32,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491532743] [2021-06-05 22:12:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:32,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:32,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491532743] [2021-06-05 22:12:32,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491532743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:32,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894307114] [2021-06-05 22:12:32,782 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 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 22:12:32,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:32,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:33,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:33,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:33,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:33,120 INFO L628 ElimStorePlain]: treesize reduction 46, result has 22.0 percent of original size [2021-06-05 22:12:33,120 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:33,121 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 22:12:33,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:84, output treesize:6 [2021-06-05 22:12:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:33,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894307114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:33,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:33,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:33,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612365559] [2021-06-05 22:12:33,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:33,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:33,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:33,172 INFO L87 Difference]: Start difference. First operand 913 states and 3024 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 22:12:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:33,606 INFO L93 Difference]: Finished difference Result 1209 states and 3823 transitions. [2021-06-05 22:12:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:33,607 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 22:12:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:33,608 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 22:12:33,608 INFO L226 Difference]: Without dead ends: 1209 [2021-06-05 22:12:33,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:12:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-05 22:12:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 928. [2021-06-05 22:12:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.3042071197411005) internal successors, (3063), 927 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3063 transitions. [2021-06-05 22:12:33,619 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3063 transitions. Word has length 22 [2021-06-05 22:12:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:33,620 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3063 transitions. [2021-06-05 22:12:33,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3063 transitions. [2021-06-05 22:12:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:33,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:33,621 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:33,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9590,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:33,821 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1641673832, now seen corresponding path program 733 times [2021-06-05 22:12:33,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:33,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884570380] [2021-06-05 22:12:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:33,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884570380] [2021-06-05 22:12:33,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884570380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96207665] [2021-06-05 22:12:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:12:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:34,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:34,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:34,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:34,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:12:34,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:34,271 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 22:12:34,271 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:34,272 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 22:12:34,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:12:34,328 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 22:12:34,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96207665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:34,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:34,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:34,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489686634] [2021-06-05 22:12:34,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:34,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:34,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:34,329 INFO L87 Difference]: Start difference. First operand 928 states and 3063 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 22:12:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:34,789 INFO L93 Difference]: Finished difference Result 1261 states and 3944 transitions. [2021-06-05 22:12:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:34,790 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 22:12:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:34,791 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 22:12:34,791 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 22:12:34,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 22:12:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 931. [2021-06-05 22:12:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.3053763440860213) internal successors, (3074), 930 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3074 transitions. [2021-06-05 22:12:34,803 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3074 transitions. Word has length 22 [2021-06-05 22:12:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:34,803 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3074 transitions. [2021-06-05 22:12:34,803 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 22:12:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3074 transitions. [2021-06-05 22:12:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:34,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:34,804 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:35,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9604,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:35,004 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:35,004 INFO L82 PathProgramCache]: Analyzing trace with hash 147766110, now seen corresponding path program 734 times [2021-06-05 22:12:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:35,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216162799] [2021-06-05 22:12:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:35,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:35,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216162799] [2021-06-05 22:12:35,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216162799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:35,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91225356] [2021-06-05 22:12:35,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:12:35,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:35,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:35,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:35,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:35,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:35,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:35,471 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:12:35,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:35,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:35,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:35,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:35,480 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 22:12:35,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:12:35,534 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 22:12:35,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91225356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:35,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:35,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:35,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764511732] [2021-06-05 22:12:35,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:35,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:35,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:35,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:35,534 INFO L87 Difference]: Start difference. First operand 931 states and 3074 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 22:12:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:35,971 INFO L93 Difference]: Finished difference Result 1218 states and 3841 transitions. [2021-06-05 22:12:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:35,971 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 22:12:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:35,973 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 22:12:35,973 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 22:12:35,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 22:12:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 923. [2021-06-05 22:12:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.3080260303687634) internal successors, (3050), 922 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3050 transitions. [2021-06-05 22:12:35,984 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3050 transitions. Word has length 22 [2021-06-05 22:12:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:35,984 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3050 transitions. [2021-06-05 22:12:35,984 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 22:12:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3050 transitions. [2021-06-05 22:12:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:35,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:35,985 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:36,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 763 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9623 [2021-06-05 22:12:36,185 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:36,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1559201876, now seen corresponding path program 735 times [2021-06-05 22:12:36,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:36,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273281850] [2021-06-05 22:12:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:36,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:36,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273281850] [2021-06-05 22:12:36,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273281850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:36,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486893035] [2021-06-05 22:12:36,312 INFO L93 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 22:12:36,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:12:36,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:36,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:36,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:36,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486893035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:36,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:36,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:36,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410447059] [2021-06-05 22:12:36,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:36,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:36,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:36,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:36,767 INFO L87 Difference]: Start difference. First operand 923 states and 3050 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 22:12:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:37,337 INFO L93 Difference]: Finished difference Result 1171 states and 3707 transitions. [2021-06-05 22:12:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:37,338 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 22:12:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:37,339 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 22:12:37,340 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 22:12:37,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:12:37,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 22:12:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 929. [2021-06-05 22:12:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.310344827586207) internal successors, (3072), 928 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3072 transitions. [2021-06-05 22:12:37,350 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3072 transitions. Word has length 22 [2021-06-05 22:12:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:37,350 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3072 transitions. [2021-06-05 22:12:37,350 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 22:12:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3072 transitions. [2021-06-05 22:12:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:37,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:37,351 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:37,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9640 [2021-06-05 22:12:37,552 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1241857698, now seen corresponding path program 736 times [2021-06-05 22:12:37,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:37,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627669645] [2021-06-05 22:12:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:37,676 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 22:12:37,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:37,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627669645] [2021-06-05 22:12:37,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627669645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:37,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283369820] [2021-06-05 22:12:37,676 INFO L93 rtionOrderModulation]: Changing 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 22:12:37,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:37,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:38,101 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 22:12:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283369820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:38,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:38,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:38,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992433688] [2021-06-05 22:12:38,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:38,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:38,102 INFO L87 Difference]: Start difference. First operand 929 states and 3072 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 22:12:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:38,624 INFO L93 Difference]: Finished difference Result 1177 states and 3714 transitions. [2021-06-05 22:12:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:38,625 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 22:12:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:38,626 INFO L225 Difference]: With dead ends: 1177 [2021-06-05 22:12:38,626 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 22:12:38,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 527.1ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 22:12:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 926. [2021-06-05 22:12:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.309189189189189) internal successors, (3061), 925 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3061 transitions. [2021-06-05 22:12:38,637 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3061 transitions. Word has length 22 [2021-06-05 22:12:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:38,637 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3061 transitions. [2021-06-05 22:12:38,637 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 22:12:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3061 transitions. [2021-06-05 22:12:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:38,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:38,638 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:38,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9657,765 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:38,838 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1779713276, now seen corresponding path program 737 times [2021-06-05 22:12:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:38,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331132264] [2021-06-05 22:12:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:38,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:38,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331132264] [2021-06-05 22:12:38,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331132264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:38,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592694983] [2021-06-05 22:12:38,972 INFO L93 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 22:12:39,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:12:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:39,428 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 22:12:39,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592694983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:39,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:39,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797825583] [2021-06-05 22:12:39,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:39,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:39,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:39,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:39,429 INFO L87 Difference]: Start difference. First operand 926 states and 3061 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 22:12:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:40,057 INFO L93 Difference]: Finished difference Result 1135 states and 3619 transitions. [2021-06-05 22:12:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:40,058 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 22:12:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:40,059 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 22:12:40,059 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:12:40,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 652.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:12:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 923. [2021-06-05 22:12:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.3080260303687634) internal successors, (3050), 922 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3050 transitions. [2021-06-05 22:12:40,069 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3050 transitions. Word has length 22 [2021-06-05 22:12:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:40,069 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3050 transitions. [2021-06-05 22:12:40,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3050 transitions. [2021-06-05 22:12:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:40,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:40,070 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:40,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 766 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9676 [2021-06-05 22:12:40,271 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2002101016, now seen corresponding path program 738 times [2021-06-05 22:12:40,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:40,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425339981] [2021-06-05 22:12:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:40,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:40,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425339981] [2021-06-05 22:12:40,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425339981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:40,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171254891] [2021-06-05 22:12:40,389 INFO L93 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 22:12:40,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171254891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:40,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:40,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327047171] [2021-06-05 22:12:40,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:40,886 INFO L87 Difference]: Start difference. First operand 923 states and 3050 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 22:12:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:41,476 INFO L93 Difference]: Finished difference Result 1165 states and 3688 transitions. [2021-06-05 22:12:41,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:41,476 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 22:12:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:41,477 INFO L225 Difference]: With dead ends: 1165 [2021-06-05 22:12:41,477 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 22:12:41,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 624.1ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:12:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 22:12:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 932. [2021-06-05 22:12:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.3114930182599354) internal successors, (3083), 931 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3083 transitions. [2021-06-05 22:12:41,488 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3083 transitions. Word has length 22 [2021-06-05 22:12:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:41,488 INFO L482 AbstractCegarLoop]: Abstraction has 932 states and 3083 transitions. [2021-06-05 22:12:41,488 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 22:12:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3083 transitions. [2021-06-05 22:12:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:41,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:41,489 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:41,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 767 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9696 [2021-06-05 22:12:41,689 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash 798958558, now seen corresponding path program 739 times [2021-06-05 22:12:41,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:41,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607580763] [2021-06-05 22:12:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:41,805 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 22:12:41,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:41,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607580763] [2021-06-05 22:12:41,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607580763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:41,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444824546] [2021-06-05 22:12:41,806 INFO 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 22:12:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:42,270 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 22:12:42,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444824546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:42,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:42,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:42,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637061806] [2021-06-05 22:12:42,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:42,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:42,271 INFO L87 Difference]: Start difference. First operand 932 states and 3083 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 22:12:42,759 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 22:12:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:42,929 INFO L93 Difference]: Finished difference Result 1171 states and 3695 transitions. [2021-06-05 22:12:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:42,929 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 22:12:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:42,930 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 22:12:42,930 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 22:12:42,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 22:12:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 929. [2021-06-05 22:12:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.310344827586207) internal successors, (3072), 928 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3072 transitions. [2021-06-05 22:12:42,941 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3072 transitions. Word has length 22 [2021-06-05 22:12:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:42,941 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3072 transitions. [2021-06-05 22:12:42,941 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 22:12:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3072 transitions. [2021-06-05 22:12:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:42,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:42,942 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:43,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9712,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:43,142 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1336814136, now seen corresponding path program 740 times [2021-06-05 22:12:43,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:43,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306079906] [2021-06-05 22:12:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:43,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:43,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306079906] [2021-06-05 22:12:43,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306079906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:43,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142375486] [2021-06-05 22:12:43,273 INFO L93 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 22:12:43,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:43,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:43,744 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 22:12:43,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142375486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:43,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:43,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:43,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379408602] [2021-06-05 22:12:43,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:43,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:43,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:43,745 INFO L87 Difference]: Start difference. First operand 929 states and 3072 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 22:12:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:44,387 INFO L93 Difference]: Finished difference Result 1135 states and 3613 transitions. [2021-06-05 22:12:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:44,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:12:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:44,388 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 22:12:44,388 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:12:44,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 672.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:12:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 926. [2021-06-05 22:12:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.309189189189189) internal successors, (3061), 925 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3061 transitions. [2021-06-05 22:12:44,398 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3061 transitions. Word has length 22 [2021-06-05 22:12:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:44,398 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3061 transitions. [2021-06-05 22:12:44,398 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 22:12:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3061 transitions. [2021-06-05 22:12:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:44,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:44,399 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:44,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9729,769 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:44,600 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:44,600 INFO L82 PathProgramCache]: Analyzing trace with hash 830467870, now seen corresponding path program 741 times [2021-06-05 22:12:44,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:44,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852550600] [2021-06-05 22:12:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:44,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:44,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852550600] [2021-06-05 22:12:44,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852550600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:44,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875201363] [2021-06-05 22:12:44,712 INFO L93 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 22:12:44,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:12:44,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:44,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:45,165 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 22:12:45,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875201363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:45,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:45,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:45,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205239627] [2021-06-05 22:12:45,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:45,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:45,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:45,166 INFO L87 Difference]: Start difference. First operand 926 states and 3061 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 22:12:45,668 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 22:12:45,855 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 22:12:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:45,925 INFO L93 Difference]: Finished difference Result 1126 states and 3589 transitions. [2021-06-05 22:12:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:45,925 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 22:12:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:45,926 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 22:12:45,926 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 22:12:45,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 22:12:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 923. [2021-06-05 22:12:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.3080260303687634) internal successors, (3050), 922 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3050 transitions. [2021-06-05 22:12:45,936 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3050 transitions. Word has length 22 [2021-06-05 22:12:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:45,937 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3050 transitions. [2021-06-05 22:12:45,937 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 22:12:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3050 transitions. [2021-06-05 22:12:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:45,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:45,938 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:46,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9747,770 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:46,138 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1141926973, now seen corresponding path program 742 times [2021-06-05 22:12:46,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:46,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639289837] [2021-06-05 22:12:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:46,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639289837] [2021-06-05 22:12:46,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639289837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299793713] [2021-06-05 22:12:46,222 INFO L93 rtionOrderModulation]: Changing 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 22:12:46,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:46,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:46,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:46,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:46,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:46,484 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 12 treesize of output 8 [2021-06-05 22:12:46,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:46,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:46,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,513 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-06-05 22:12:46,514 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 22:12:46,514 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:78, output treesize:15 [2021-06-05 22:12:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299793713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:46,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:46,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 22:12:46,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065451938] [2021-06-05 22:12:46,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:46,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:46,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:46,561 INFO L87 Difference]: Start difference. First operand 923 states and 3050 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 22:12:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:46,961 INFO L93 Difference]: Finished difference Result 1353 states and 4311 transitions. [2021-06-05 22:12:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:12:46,961 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 22:12:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:46,962 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 22:12:46,963 INFO L226 Difference]: Without dead ends: 1283 [2021-06-05 22:12:46,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:12:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-06-05 22:12:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 930. [2021-06-05 22:12:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.3143164693218514) internal successors, (3079), 929 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3079 transitions. [2021-06-05 22:12:46,973 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3079 transitions. Word has length 22 [2021-06-05 22:12:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:46,973 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 3079 transitions. [2021-06-05 22:12:46,973 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 22:12:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3079 transitions. [2021-06-05 22:12:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:46,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:46,974 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:47,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 771 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9766 [2021-06-05 22:12:47,175 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:47,175 INFO L82 PathProgramCache]: Analyzing trace with hash 83932008, now seen corresponding path program 743 times [2021-06-05 22:12:47,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:47,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314628999] [2021-06-05 22:12:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:47,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:47,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314628999] [2021-06-05 22:12:47,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314628999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:47,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556679766] [2021-06-05 22:12:47,312 INFO L93 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 22:12:47,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:47,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:47,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:47,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:47,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:47,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:47,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:47,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:47,676 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 22:12:47,676 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:47,676 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 22:12:47,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:12:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556679766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:47,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:47,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:47,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836264681] [2021-06-05 22:12:47,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:47,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:47,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:47,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:47,729 INFO L87 Difference]: Start difference. First operand 930 states and 3079 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 22:12:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:48,270 INFO L93 Difference]: Finished difference Result 1252 states and 3955 transitions. [2021-06-05 22:12:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:48,270 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 22:12:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:48,272 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 22:12:48,272 INFO L226 Difference]: Without dead ends: 1252 [2021-06-05 22:12:48,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:12:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-06-05 22:12:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 940. [2021-06-05 22:12:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.306709265175719) internal successors, (3105), 939 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3105 transitions. [2021-06-05 22:12:48,283 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3105 transitions. Word has length 22 [2021-06-05 22:12:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:48,283 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3105 transitions. [2021-06-05 22:12:48,283 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 22:12:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3105 transitions. [2021-06-05 22:12:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:48,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:48,284 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:48,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9784,772 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:48,485 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1242575538, now seen corresponding path program 744 times [2021-06-05 22:12:48,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:48,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367078943] [2021-06-05 22:12:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:48,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:48,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367078943] [2021-06-05 22:12:48,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367078943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:48,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108446344] [2021-06-05 22:12:48,618 INFO L93 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 22:12:48,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:12:48,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:48,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:48,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:12:48,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:48,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:12:48,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,002 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.7 percent of original size [2021-06-05 22:12:49,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:12:49,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:49,020 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 22:12:49,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 22:12:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:49,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108446344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:49,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:49,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:49,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242904810] [2021-06-05 22:12:49,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:49,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:49,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:49,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:49,078 INFO L87 Difference]: Start difference. First operand 940 states and 3105 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 22:12:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:49,589 INFO L93 Difference]: Finished difference Result 1304 states and 4076 transitions. [2021-06-05 22:12:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:49,589 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 22:12:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:49,591 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 22:12:49,591 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 22:12:49,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 22:12:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 943. [2021-06-05 22:12:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 3.307855626326964) internal successors, (3116), 942 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 3116 transitions. [2021-06-05 22:12:49,602 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 3116 transitions. Word has length 22 [2021-06-05 22:12:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:49,603 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 3116 transitions. [2021-06-05 22:12:49,603 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 22:12:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 3116 transitions. [2021-06-05 22:12:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:49,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:49,604 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:49,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9800,773 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:49,804 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:49,804 INFO L82 PathProgramCache]: Analyzing trace with hash -251332184, now seen corresponding path program 745 times [2021-06-05 22:12:49,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:49,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072848308] [2021-06-05 22:12:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:49,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:49,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072848308] [2021-06-05 22:12:49,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072848308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:49,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38562543] [2021-06-05 22:12:49,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:12:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:50,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:50,282 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 22:12:50,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,294 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 22:12:50,294 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:50,295 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 22:12:50,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 22:12:50,350 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 22:12:50,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38562543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:50,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:50,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088959037] [2021-06-05 22:12:50,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:50,350 INFO L87 Difference]: Start difference. First operand 943 states and 3116 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 22:12:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:50,813 INFO L93 Difference]: Finished difference Result 1261 states and 3973 transitions. [2021-06-05 22:12:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:50,814 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 22:12:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:50,815 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 22:12:50,815 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 22:12:50,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 22:12:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 935. [2021-06-05 22:12:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.310492505353319) internal successors, (3092), 934 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3092 transitions. [2021-06-05 22:12:50,827 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3092 transitions. Word has length 22 [2021-06-05 22:12:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:50,827 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 3092 transitions. [2021-06-05 22:12:50,827 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 22:12:50,827 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3092 transitions. [2021-06-05 22:12:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:50,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:50,828 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:51,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9818,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:51,029 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1958300170, now seen corresponding path program 746 times [2021-06-05 22:12:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:51,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104296500] [2021-06-05 22:12:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:51,206 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 22:12:51,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:51,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104296500] [2021-06-05 22:12:51,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104296500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:51,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648560023] [2021-06-05 22:12:51,206 INFO L93 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 22:12:51,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:51,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:51,676 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 22:12:51,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648560023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:51,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:51,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:51,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953254578] [2021-06-05 22:12:51,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:51,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:51,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:51,677 INFO L87 Difference]: Start difference. First operand 935 states and 3092 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 22:12:52,211 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-06-05 22:12:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:52,293 INFO L93 Difference]: Finished difference Result 1204 states and 3808 transitions. [2021-06-05 22:12:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:52,293 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 22:12:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:52,295 INFO L225 Difference]: With dead ends: 1204 [2021-06-05 22:12:52,295 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 22:12:52,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:12:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 22:12:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 941. [2021-06-05 22:12:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.3127659574468087) internal successors, (3114), 940 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3114 transitions. [2021-06-05 22:12:52,306 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3114 transitions. Word has length 22 [2021-06-05 22:12:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:52,306 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3114 transitions. [2021-06-05 22:12:52,306 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 22:12:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3114 transitions. [2021-06-05 22:12:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:52,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:52,307 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:52,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9836,775 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:52,508 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:52,508 INFO L82 PathProgramCache]: Analyzing trace with hash 842759404, now seen corresponding path program 747 times [2021-06-05 22:12:52,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:52,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141708063] [2021-06-05 22:12:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:52,658 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 22:12:52,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:52,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141708063] [2021-06-05 22:12:52,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141708063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:52,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140196014] [2021-06-05 22:12:52,658 INFO L93 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 22:12:52,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:12:52,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:53,129 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 22:12:53,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140196014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:53,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:53,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:53,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70639900] [2021-06-05 22:12:53,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:53,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:53,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:53,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:53,130 INFO L87 Difference]: Start difference. First operand 941 states and 3114 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 22:12:53,732 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-06-05 22:12:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:53,817 INFO L93 Difference]: Finished difference Result 1210 states and 3815 transitions. [2021-06-05 22:12:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:53,818 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 22:12:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:53,819 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 22:12:53,819 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 22:12:53,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 723.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 22:12:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 938. [2021-06-05 22:12:53,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.311632870864461) internal successors, (3103), 937 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3103 transitions. [2021-06-05 22:12:53,830 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3103 transitions. Word has length 22 [2021-06-05 22:12:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:53,830 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3103 transitions. [2021-06-05 22:12:53,830 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 22:12:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3103 transitions. [2021-06-05 22:12:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:53,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:53,831 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:54,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9853 [2021-06-05 22:12:54,031 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:54,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1380614982, now seen corresponding path program 748 times [2021-06-05 22:12:54,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:54,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260261780] [2021-06-05 22:12:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:54,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260261780] [2021-06-05 22:12:54,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260261780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769617687] [2021-06-05 22:12:54,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:12:54,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:54,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:54,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:54,686 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 22:12:54,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769617687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:54,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:54,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:54,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499091439] [2021-06-05 22:12:54,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:54,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:54,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:54,687 INFO L87 Difference]: Start difference. First operand 938 states and 3103 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 22:12:55,237 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-06-05 22:12:55,399 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2021-06-05 22:12:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:55,427 INFO L93 Difference]: Finished difference Result 1168 states and 3720 transitions. [2021-06-05 22:12:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:12:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:55,429 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 22:12:55,429 INFO L226 Difference]: Without dead ends: 1156 [2021-06-05 22:12:55,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-06-05 22:12:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 930. [2021-06-05 22:12:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.3143164693218514) internal successors, (3079), 929 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3079 transitions. [2021-06-05 22:12:55,439 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3079 transitions. Word has length 22 [2021-06-05 22:12:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:55,439 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 3079 transitions. [2021-06-05 22:12:55,439 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 22:12:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3079 transitions. [2021-06-05 22:12:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:55,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:55,440 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:55,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 777 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9870 [2021-06-05 22:12:55,641 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:55,641 INFO L82 PathProgramCache]: Analyzing trace with hash -384127965, now seen corresponding path program 749 times [2021-06-05 22:12:55,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:55,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303082242] [2021-06-05 22:12:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:55,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303082242] [2021-06-05 22:12:55,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303082242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346007887] [2021-06-05 22:12:55,729 INFO L93 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 22:12:55,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:12:55,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:55,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:55,972 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 22:12:55,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:56,030 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 22:12:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:12:56,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:56,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:56,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:56,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:56,073 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.5 percent of original size [2021-06-05 22:12:56,073 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:12:56,074 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 22:12:56,074 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:105, output treesize:21 [2021-06-05 22:12:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:56,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346007887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:56,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:56,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 22:12:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255518293] [2021-06-05 22:12:56,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:56,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:56,154 INFO L87 Difference]: Start difference. First operand 930 states and 3079 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 22:12:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:56,683 INFO L93 Difference]: Finished difference Result 1480 states and 4643 transitions. [2021-06-05 22:12:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:12:56,683 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 22:12:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:56,685 INFO L225 Difference]: With dead ends: 1480 [2021-06-05 22:12:56,685 INFO L226 Difference]: Without dead ends: 1410 [2021-06-05 22:12:56,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-05 22:12:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 937. [2021-06-05 22:12:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.327991452991453) internal successors, (3115), 936 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3115 transitions. [2021-06-05 22:12:56,697 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3115 transitions. Word has length 22 [2021-06-05 22:12:56,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:56,697 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 3115 transitions. [2021-06-05 22:12:56,697 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 22:12:56,697 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3115 transitions. [2021-06-05 22:12:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:56,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:56,698 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:56,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9886,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:56,899 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash 625247198, now seen corresponding path program 750 times [2021-06-05 22:12:56,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:56,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841825919] [2021-06-05 22:12:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:57,026 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 22:12:57,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841825919] [2021-06-05 22:12:57,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841825919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558321314] [2021-06-05 22:12:57,026 INFO L93 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 22:12:57,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:57,334 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_665, v_prenex_667], 1=[v_prenex_669, v_prenex_670, nondet_0]} [2021-06-05 22:12:57,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:12:57,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,427 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-06-05 22:12:57,427 INFO L518 ElimStorePlain]: Eliminatee v_prenex_667 vanished before elimination [2021-06-05 22:12:57,430 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 6 treesize of output 4 [2021-06-05 22:12:57,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:57,434 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 13 treesize of output 9 [2021-06-05 22:12:57,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,484 INFO L628 ElimStorePlain]: treesize reduction 13, result has 81.7 percent of original size [2021-06-05 22:12:57,484 INFO L518 ElimStorePlain]: Eliminatee v_prenex_670 vanished before elimination [2021-06-05 22:12:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:57,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:57,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:57,511 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 22:12:57,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 22:12:57,599 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 22:12:57,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558321314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:57,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:57,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:57,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432435689] [2021-06-05 22:12:57,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:57,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:57,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:57,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:57,600 INFO L87 Difference]: Start difference. First operand 937 states and 3115 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 22:12:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:58,130 INFO L93 Difference]: Finished difference Result 1435 states and 4486 transitions. [2021-06-05 22:12:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:58,130 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 22:12:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:58,132 INFO L225 Difference]: With dead ends: 1435 [2021-06-05 22:12:58,132 INFO L226 Difference]: Without dead ends: 1435 [2021-06-05 22:12:58,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-06-05 22:12:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 949. [2021-06-05 22:12:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 3.329113924050633) internal successors, (3156), 948 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 3156 transitions. [2021-06-05 22:12:58,144 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 3156 transitions. Word has length 22 [2021-06-05 22:12:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:58,144 INFO L482 AbstractCegarLoop]: Abstraction has 949 states and 3156 transitions. [2021-06-05 22:12:58,144 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 22:12:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 3156 transitions. [2021-06-05 22:12:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:58,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:58,145 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:58,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9904,779 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:58,346 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:58,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1783890728, now seen corresponding path program 751 times [2021-06-05 22:12:58,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:58,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620413371] [2021-06-05 22:12:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:58,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:58,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620413371] [2021-06-05 22:12:58,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620413371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:58,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354025053] [2021-06-05 22:12:58,470 INFO 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 22:12:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:12:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:58,775 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_673, v_prenex_674, v_prenex_676], 1=[v_prenex_680, nondet_0, v_prenex_678]} [2021-06-05 22:12:58,779 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 5 treesize of output 3 [2021-06-05 22:12:58,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,913 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 22:12:58,914 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.5 percent of original size [2021-06-05 22:12:58,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:12:58,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:58,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:12:58,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:59,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:59,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:59,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:12:59,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:59,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:59,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:12:59,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:12:59,110 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:59,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:59,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_678 vanished before elimination [2021-06-05 22:12:59,166 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 22:12:59,166 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 22:12:59,258 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 22:12:59,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354025053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:59,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:59,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:12:59,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998350482] [2021-06-05 22:12:59,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:12:59,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:59,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:12:59,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:12:59,259 INFO L87 Difference]: Start difference. First operand 949 states and 3156 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 22:12:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:59,775 INFO L93 Difference]: Finished difference Result 1467 states and 4545 transitions. [2021-06-05 22:12:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:12:59,776 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 22:12:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:59,778 INFO L225 Difference]: With dead ends: 1467 [2021-06-05 22:12:59,778 INFO L226 Difference]: Without dead ends: 1467 [2021-06-05 22:12:59,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 441.6ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-06-05 22:12:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 955. [2021-06-05 22:12:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.3343815513626835) internal successors, (3181), 954 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3181 transitions. [2021-06-05 22:12:59,790 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3181 transitions. Word has length 22 [2021-06-05 22:12:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:59,790 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3181 transitions. [2021-06-05 22:12:59,790 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 22:12:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3181 transitions. [2021-06-05 22:12:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:12:59,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:59,791 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:59,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9922,780 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:59,992 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:59,992 INFO L82 PathProgramCache]: Analyzing trace with hash 289983006, now seen corresponding path program 752 times [2021-06-05 22:12:59,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:59,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825269724] [2021-06-05 22:12:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:00,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:00,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825269724] [2021-06-05 22:13:00,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825269724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:00,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069396443] [2021-06-05 22:13:00,115 INFO L93 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 22:13:00,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:00,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:13:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:00,432 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_683, v_prenex_684, v_prenex_686], 1=[v_prenex_690, nondet_0, v_prenex_688]} [2021-06-05 22:13:00,437 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 5 treesize of output 3 [2021-06-05 22:13:00,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,569 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 22:13:00,569 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.5 percent of original size [2021-06-05 22:13:00,573 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 6 treesize of output 4 [2021-06-05 22:13:00,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:00,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:13:00,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:00,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_690 vanished before elimination [2021-06-05 22:13:00,699 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 6 treesize of output 4 [2021-06-05 22:13:00,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:00,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:13:00,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,796 INFO L628 ElimStorePlain]: treesize reduction 15, result has 87.1 percent of original size [2021-06-05 22:13:00,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:13:00,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:00,803 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 8 [2021-06-05 22:13:00,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:00,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:00,845 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 22:13:00,846 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 22:13:00,936 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 22:13:00,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069396443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:00,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:00,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 22:13:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378194324] [2021-06-05 22:13:00,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:13:00,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:13:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:00,937 INFO L87 Difference]: Start difference. First operand 955 states and 3181 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 22:13:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:01,460 INFO L93 Difference]: Finished difference Result 1424 states and 4436 transitions. [2021-06-05 22:13:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:13:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:13:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:01,462 INFO L225 Difference]: With dead ends: 1424 [2021-06-05 22:13:01,462 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 22:13:01,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:13:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 22:13:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 947. [2021-06-05 22:13:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.3372093023255816) internal successors, (3157), 946 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3157 transitions. [2021-06-05 22:13:01,474 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3157 transitions. Word has length 22 [2021-06-05 22:13:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:01,474 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3157 transitions. [2021-06-05 22:13:01,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3157 transitions. [2021-06-05 22:13:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:13:01,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:01,476 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:01,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 781 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-06-05 22:13:01,676 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1035759683, now seen corresponding path program 753 times [2021-06-05 22:13:01,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:01,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305735249] [2021-06-05 22:13:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:01,757 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 22:13:01,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:01,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305735249] [2021-06-05 22:13:01,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305735249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:01,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174007571] [2021-06-05 22:13:01,757 INFO L93 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 22:13:01,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:13:01,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:13:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:02,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:13:02,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:13:02,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:02,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:13:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 22:13:02,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,077 INFO L628 ElimStorePlain]: treesize reduction 43, result has 46.3 percent of original size [2021-06-05 22:13:02,077 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:13:02,078 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 22:13:02,078 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:21 [2021-06-05 22:13:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:02,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174007571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:02,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:02,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 22:13:02,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673031253] [2021-06-05 22:13:02,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:02,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:02,150 INFO L87 Difference]: Start difference. First operand 947 states and 3157 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) Received shutdown request... [2021-06-05 22:13:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:13:02,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9958,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:02,499 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:13:02,501 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:13:02,502 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:13:02,502 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:13:02 BasicIcfg [2021-06-05 22:13:02,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:13:02,502 INFO L168 Benchmark]: Toolchain (without parser) took 838625.47 ms. Allocated memory was 356.5 MB in the beginning and 539.0 MB in the end (delta: 182.5 MB). Free memory was 337.9 MB in the beginning and 346.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 173.6 MB. Max. memory is 16.0 GB. [2021-06-05 22:13:02,503 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 356.5 MB. Free memory is still 339.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:13:02,503 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.44 ms. Allocated memory is still 356.5 MB. Free memory was 337.8 MB in the beginning and 336.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:13:02,503 INFO L168 Benchmark]: Boogie Preprocessor took 18.37 ms. Allocated memory is still 356.5 MB. Free memory was 336.3 MB in the beginning and 335.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:13:02,503 INFO L168 Benchmark]: RCFGBuilder took 578.83 ms. Allocated memory is still 356.5 MB. Free memory was 335.2 MB in the beginning and 335.3 MB in the end (delta: -133.6 kB). Peak memory consumption was 31.5 MB. Max. memory is 16.0 GB. [2021-06-05 22:13:02,503 INFO L168 Benchmark]: TraceAbstraction took 837994.16 ms. Allocated memory was 356.5 MB in the beginning and 539.0 MB in the end (delta: 182.5 MB). Free memory was 334.3 MB in the beginning and 346.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 169.6 MB. Max. memory is 16.0 GB. [2021-06-05 22:13:02,503 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 0.14 ms. Allocated memory is still 356.5 MB. Free memory is still 339.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.44 ms. Allocated memory is still 356.5 MB. Free memory was 337.8 MB in the beginning and 336.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.37 ms. Allocated memory is still 356.5 MB. Free memory was 336.3 MB in the beginning and 335.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 578.83 ms. Allocated memory is still 356.5 MB. Free memory was 335.2 MB in the beginning and 335.3 MB in the end (delta: -133.6 kB). Peak memory consumption was 31.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 837994.16 ms. Allocated memory was 356.5 MB in the beginning and 539.0 MB in the end (delta: 182.5 MB). Free memory was 334.3 MB in the beginning and 346.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 169.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (947states) and FLOYD_HOARE automaton (currently 8 states, 16 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 837907.5ms, OverallIterations: 782, TraceHistogramMax: 3, EmptinessCheckTime: 411.2ms, AutomataDifference: 372151.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41136 SDtfs, 79729 SDslu, 247033 SDs, 0 SdLazy, 288293 SolverSat, 6474 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 115366.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27872 GetRequests, 13187 SyntacticMatches, 460 SemanticMatches, 14224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44490 ImplicationChecksByTransitivity, 364354.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=955occurred in iteration=780, InterpolantAutomatonStates: 8557, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4339.6ms AutomataMinimizationTime, 781 MinimizatonAttempts, 169428 StatesRemovedByMinimization, 780 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4153.1ms SsaConstructionTime, 9195.5ms SatisfiabilityAnalysisTime, 226986.6ms InterpolantComputationTime, 31857 NumberOfCodeBlocks, 31852 NumberOfCodeBlocksAsserted, 2291 NumberOfCheckSat, 30294 ConstructedInterpolants, 775 QuantifiedInterpolants, 282444 SizeOfPredicates, 7002 NumberOfNonLiveVariables, 73240 ConjunctsInSsa, 16731 ConjunctsInUnsatCore, 1563 InterpolantComputations, 3 PerfectInterpolantSequences, 2198/7638 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