/usr/bin/java -Xmx8000000000 -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/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:55:23,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:55:23,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:55:23,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:55:23,982 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 [2021-07-09 17:55:24,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:55:24,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:55:24,013 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:55:24,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:55:24,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:55:24,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:55:24,016 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:55:24,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:55:24,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:55:24,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:55:24,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:55:24,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:55:24,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:55:24,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:55:24,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:55:24,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:55:24,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:55:24,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:55:24,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:55:24,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:55:24,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:55:24,020 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:55:24,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:55:24,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:55:24,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:55:24,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:55:24,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:55:24,328 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:55:24,329 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:55:24,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-07-09 17:55:24,329 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-07-09 17:55:24,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:55:24,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:55:24,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:55:24,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:55:24,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:55:24,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:55:24,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:55:24,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:55:24,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:55:24,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/1) ... [2021-07-09 17:55:24,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:55:24,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:55:24,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:55:24,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:55:24,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (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 [2021-07-09 17:55:24,544 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:55:24,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:55:24,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:55:24,556 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:55:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:55:24,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:55:24,557 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:55:24,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:55:24,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:55:24,557 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:55:24,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:55:24,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:55:24,557 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:55:24,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:55:24,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:55:24,558 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:55:24,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:55:24,793 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:55:24,794 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:55:24 BoogieIcfgContainer [2021-07-09 17:55:24,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:55:24,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:55:24,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:55:24,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:55:24,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:55:24" (1/2) ... [2021-07-09 17:55:24,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8c568f and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:55:24, skipping insertion in model container [2021-07-09 17:55:24,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:55:24" (2/2) ... [2021-07-09 17:55:24,800 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-07-09 17:55:24,804 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:55:24,804 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:55:24,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:55:24,805 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:55:24,874 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 17:55:24,891 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 17:55:24,905 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:55:24,906 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:55:24,906 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:55:24,906 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:55:24,906 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:55:24,906 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:55:24,906 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:55:24,906 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:55:24,914 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-07-09 17:55:24,983 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:55:25,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:25,003 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:25,003 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:25,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1286358700, now seen corresponding path program 1 times [2021-07-09 17:55:25,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:25,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86615726] [2021-07-09 17:55:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:25,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86615726] [2021-07-09 17:55:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86615726] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:25,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:25,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:55:25,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736182409] [2021-07-09 17:55:25,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:55:25,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:55:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:55:25,234 INFO L87 Difference]: Start difference. First operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 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 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:25,326 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-07-09 17:55:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:55:25,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:55:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:25,347 INFO L225 Difference]: With dead ends: 1268 [2021-07-09 17:55:25,347 INFO L226 Difference]: Without dead ends: 1057 [2021-07-09 17:55:25,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:55:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-07-09 17:55:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-07-09 17:55:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-07-09 17:55:25,460 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-07-09 17:55:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:25,461 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-07-09 17:55:25,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-07-09 17:55:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:55:25,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:25,464 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:25,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:55:25,465 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash -642766254, now seen corresponding path program 1 times [2021-07-09 17:55:25,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:25,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902424476] [2021-07-09 17:55:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:25,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902424476] [2021-07-09 17:55:25,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902424476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220834659] [2021-07-09 17:55:25,521 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 [2021-07-09 17:55:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:55:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:25,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220834659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:25,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:25,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-09 17:55:25,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858854992] [2021-07-09 17:55:25,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:55:25,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:25,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:55:25,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:55:25,811 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:25,950 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-07-09 17:55:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:55:25,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:55:25,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:25,958 INFO L225 Difference]: With dead ends: 1233 [2021-07-09 17:55:25,958 INFO L226 Difference]: Without dead ends: 1233 [2021-07-09 17:55:25,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:55:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-09 17:55:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-07-09 17:55:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-07-09 17:55:26,001 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-07-09 17:55:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:26,002 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-07-09 17:55:26,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-07-09 17:55:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:55:26,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:26,005 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:26,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:55:26,224 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:26,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:26,224 INFO L82 PathProgramCache]: Analyzing trace with hash -965486860, now seen corresponding path program 1 times [2021-07-09 17:55:26,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:26,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223284036] [2021-07-09 17:55:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:26,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223284036] [2021-07-09 17:55:26,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223284036] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:26,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:26,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:55:26,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485840331] [2021-07-09 17:55:26,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:55:26,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:26,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:55:26,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:55:26,259 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:26,315 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-07-09 17:55:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:55:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:55:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:26,322 INFO L225 Difference]: With dead ends: 1101 [2021-07-09 17:55:26,322 INFO L226 Difference]: Without dead ends: 1047 [2021-07-09 17:55:26,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:55:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-07-09 17:55:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-07-09 17:55:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-07-09 17:55:26,355 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-07-09 17:55:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:26,355 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-07-09 17:55:26,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-07-09 17:55:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:55:26,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:26,359 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:26,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:55:26,359 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:26,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1366009100, now seen corresponding path program 2 times [2021-07-09 17:55:26,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:26,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625438962] [2021-07-09 17:55:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:26,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625438962] [2021-07-09 17:55:26,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625438962] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:26,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:26,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:55:26,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064001505] [2021-07-09 17:55:26,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:55:26,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:26,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:55:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:55:26,413 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:26,463 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-07-09 17:55:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:55:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:55:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:26,469 INFO L225 Difference]: With dead ends: 834 [2021-07-09 17:55:26,469 INFO L226 Difference]: Without dead ends: 834 [2021-07-09 17:55:26,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:55:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-07-09 17:55:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-07-09 17:55:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-07-09 17:55:26,519 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-07-09 17:55:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:26,519 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-07-09 17:55:26,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-07-09 17:55:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:55:26,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:26,522 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:26,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:55:26,522 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:26,523 INFO L82 PathProgramCache]: Analyzing trace with hash -718106448, now seen corresponding path program 2 times [2021-07-09 17:55:26,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:26,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366935341] [2021-07-09 17:55:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:26,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366935341] [2021-07-09 17:55:26,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366935341] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:26,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:26,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:55:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012962363] [2021-07-09 17:55:26,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:55:26,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:55:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:55:26,556 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:26,616 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-07-09 17:55:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:55:26,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:55:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:26,621 INFO L225 Difference]: With dead ends: 878 [2021-07-09 17:55:26,621 INFO L226 Difference]: Without dead ends: 838 [2021-07-09 17:55:26,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:55:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-07-09 17:55:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-07-09 17:55:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-07-09 17:55:26,644 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-07-09 17:55:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:26,644 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-07-09 17:55:26,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-07-09 17:55:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:26,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:26,650 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:26,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:55:26,650 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash -948436878, now seen corresponding path program 1 times [2021-07-09 17:55:26,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:26,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412138268] [2021-07-09 17:55:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:26,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412138268] [2021-07-09 17:55:26,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412138268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:26,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21040937] [2021-07-09 17:55:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:55:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:55:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:26,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21040937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:26,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:26,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-09 17:55:26,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075224153] [2021-07-09 17:55:26,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:55:26,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:55:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:55:26,822 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:26,894 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-07-09 17:55:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:55:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:26,912 INFO L225 Difference]: With dead ends: 3314 [2021-07-09 17:55:26,912 INFO L226 Difference]: Without dead ends: 3000 [2021-07-09 17:55:26,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:55:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-07-09 17:55:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-07-09 17:55:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-07-09 17:55:27,015 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-07-09 17:55:27,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:27,016 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-07-09 17:55:27,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-07-09 17:55:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:55:27,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:27,022 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:27,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:27,239 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:27,239 INFO L82 PathProgramCache]: Analyzing trace with hash -390423246, now seen corresponding path program 2 times [2021-07-09 17:55:27,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:27,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116137731] [2021-07-09 17:55:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:27,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:27,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116137731] [2021-07-09 17:55:27,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116137731] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:27,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:27,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:55:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002728180] [2021-07-09 17:55:27,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:55:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:55:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:55:27,277 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:27,376 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-07-09 17:55:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:55:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:55:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:27,409 INFO L225 Difference]: With dead ends: 3426 [2021-07-09 17:55:27,409 INFO L226 Difference]: Without dead ends: 3395 [2021-07-09 17:55:27,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:55:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-07-09 17:55:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-07-09 17:55:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-07-09 17:55:27,550 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-07-09 17:55:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:27,551 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-07-09 17:55:27,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-07-09 17:55:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:27,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:27,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:27,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:55:27,558 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1743273360, now seen corresponding path program 3 times [2021-07-09 17:55:27,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:27,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529253651] [2021-07-09 17:55:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:27,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529253651] [2021-07-09 17:55:27,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529253651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906621271] [2021-07-09 17:55:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:27,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:55:27,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:27,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:27,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906621271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:27,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:27,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 17:55:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482060024] [2021-07-09 17:55:27,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:55:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:55:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:55:27,857 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:28,189 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-07-09 17:55:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:55:28,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:28,240 INFO L225 Difference]: With dead ends: 10235 [2021-07-09 17:55:28,241 INFO L226 Difference]: Without dead ends: 10235 [2021-07-09 17:55:28,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:55:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-07-09 17:55:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-07-09 17:55:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-07-09 17:55:28,424 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-07-09 17:55:28,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:28,426 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-07-09 17:55:28,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-07-09 17:55:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:28,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:28,438 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:28,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:28,653 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash 218451410, now seen corresponding path program 1 times [2021-07-09 17:55:28,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:28,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36422470] [2021-07-09 17:55:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:28,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:28,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36422470] [2021-07-09 17:55:28,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36422470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:28,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540944488] [2021-07-09 17:55:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:55:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:55:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:28,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540944488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:28,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:28,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 17:55:28,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945026907] [2021-07-09 17:55:28,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:55:28,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:55:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:55:28,882 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:29,018 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-07-09 17:55:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:55:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:29,052 INFO L225 Difference]: With dead ends: 8631 [2021-07-09 17:55:29,052 INFO L226 Difference]: Without dead ends: 8631 [2021-07-09 17:55:29,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:55:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-07-09 17:55:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-07-09 17:55:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-07-09 17:55:29,316 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-07-09 17:55:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:29,316 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-07-09 17:55:29,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-07-09 17:55:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:29,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:29,334 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:29,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:29,551 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash 54399028, now seen corresponding path program 4 times [2021-07-09 17:55:29,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:29,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973832463] [2021-07-09 17:55:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:29,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973832463] [2021-07-09 17:55:29,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973832463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200780543] [2021-07-09 17:55:29,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:29,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:29,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:29,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200780543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:29,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:29,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:55:29,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345473541] [2021-07-09 17:55:29,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:55:29,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:29,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:55:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:55:29,848 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:30,281 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-07-09 17:55:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:55:30,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:30,356 INFO L225 Difference]: With dead ends: 15361 [2021-07-09 17:55:30,356 INFO L226 Difference]: Without dead ends: 15091 [2021-07-09 17:55:30,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:55:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-07-09 17:55:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-07-09 17:55:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-07-09 17:55:30,845 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-07-09 17:55:30,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:30,845 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-07-09 17:55:30,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-07-09 17:55:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:30,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:30,875 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:31,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:55:31,096 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1842610448, now seen corresponding path program 1 times [2021-07-09 17:55:31,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:31,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108050549] [2021-07-09 17:55:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:31,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:31,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108050549] [2021-07-09 17:55:31,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108050549] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:31,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:31,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:55:31,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678961370] [2021-07-09 17:55:31,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:55:31,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:55:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:55:31,128 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-07-09 17:55:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:31,333 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-07-09 17:55:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:55:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-07-09 17:55:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:31,388 INFO L225 Difference]: With dead ends: 11634 [2021-07-09 17:55:31,388 INFO L226 Difference]: Without dead ends: 11496 [2021-07-09 17:55:31,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:55:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-07-09 17:55:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-07-09 17:55:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-07-09 17:55:31,718 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-07-09 17:55:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:31,718 INFO L482 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-07-09 17:55:31,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-07-09 17:55:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-07-09 17:55:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:31,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:31,823 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:31,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 17:55:31,823 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -530233040, now seen corresponding path program 2 times [2021-07-09 17:55:31,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:31,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760014161] [2021-07-09 17:55:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:31,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:31,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760014161] [2021-07-09 17:55:31,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760014161] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:31,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:31,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:55:31,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875097548] [2021-07-09 17:55:31,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:55:31,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:55:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:55:31,871 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-07-09 17:55:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:31,975 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-07-09 17:55:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:55:31,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-07-09 17:55:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:32,016 INFO L225 Difference]: With dead ends: 10977 [2021-07-09 17:55:32,016 INFO L226 Difference]: Without dead ends: 10950 [2021-07-09 17:55:32,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:55:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-07-09 17:55:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-07-09 17:55:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-07-09 17:55:32,359 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-07-09 17:55:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:32,359 INFO L482 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-07-09 17:55:32,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-07-09 17:55:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-07-09 17:55:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:32,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:32,386 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:32,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 17:55:32,386 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash -175459084, now seen corresponding path program 2 times [2021-07-09 17:55:32,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:32,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105238973] [2021-07-09 17:55:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105238973] [2021-07-09 17:55:32,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105238973] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:55:32,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:55:32,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:55:32,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632900675] [2021-07-09 17:55:32,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:55:32,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:32,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:55:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:55:32,424 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-07-09 17:55:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:32,598 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-07-09 17:55:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:55:32,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-07-09 17:55:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:32,637 INFO L225 Difference]: With dead ends: 11062 [2021-07-09 17:55:32,637 INFO L226 Difference]: Without dead ends: 11002 [2021-07-09 17:55:32,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:55:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-07-09 17:55:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-07-09 17:55:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-07-09 17:55:32,983 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-07-09 17:55:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:32,984 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-07-09 17:55:32,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-07-09 17:55:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-07-09 17:55:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:33,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:33,009 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:33,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 17:55:33,009 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1035058804, now seen corresponding path program 5 times [2021-07-09 17:55:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:33,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27030970] [2021-07-09 17:55:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:33,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:33,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27030970] [2021-07-09 17:55:33,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27030970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:33,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431238498] [2021-07-09 17:55:33,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:33,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:55:33,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:33,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:33,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431238498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:33,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:33,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:55:33,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94970890] [2021-07-09 17:55:33,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:33,230 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:33,664 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-07-09 17:55:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:55:33,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:33,742 INFO L225 Difference]: With dead ends: 17289 [2021-07-09 17:55:33,742 INFO L226 Difference]: Without dead ends: 17289 [2021-07-09 17:55:33,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-07-09 17:55:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-07-09 17:55:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-07-09 17:55:34,181 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-07-09 17:55:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:34,181 INFO L482 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-07-09 17:55:34,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-07-09 17:55:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:34,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:34,208 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:34,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:34,425 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:34,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1682961456, now seen corresponding path program 6 times [2021-07-09 17:55:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:34,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788171903] [2021-07-09 17:55:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:34,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:34,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788171903] [2021-07-09 17:55:34,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788171903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:34,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730305668] [2021-07-09 17:55:34,473 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 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 [2021-07-09 17:55:34,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:55:34,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:34,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:34,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730305668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:34,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:34,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:55:34,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764245272] [2021-07-09 17:55:34,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:34,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:34,619 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:35,097 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-07-09 17:55:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:55:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:35,170 INFO L225 Difference]: With dead ends: 17283 [2021-07-09 17:55:35,170 INFO L226 Difference]: Without dead ends: 17145 [2021-07-09 17:55:35,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-07-09 17:55:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-07-09 17:55:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-07-09 17:55:35,559 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-07-09 17:55:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:35,559 INFO L482 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-07-09 17:55:35,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-07-09 17:55:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:35,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:35,586 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:35,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:55:35,804 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash -915931212, now seen corresponding path program 7 times [2021-07-09 17:55:35,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:35,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574397313] [2021-07-09 17:55:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:35,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574397313] [2021-07-09 17:55:35,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574397313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143514545] [2021-07-09 17:55:35,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-09 17:55:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:35,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:35,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:36,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143514545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:36,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:36,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:55:36,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722111164] [2021-07-09 17:55:36,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:55:36,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:36,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:55:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:55:36,020 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:36,676 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-07-09 17:55:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:55:36,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:36,848 INFO L225 Difference]: With dead ends: 26096 [2021-07-09 17:55:36,848 INFO L226 Difference]: Without dead ends: 26096 [2021-07-09 17:55:36,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:55:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-07-09 17:55:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-07-09 17:55:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-07-09 17:55:37,484 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-07-09 17:55:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:37,484 INFO L482 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-07-09 17:55:37,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-07-09 17:55:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:37,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:37,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:37,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:55:37,839 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:37,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1035025234, now seen corresponding path program 8 times [2021-07-09 17:55:37,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:37,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425415440] [2021-07-09 17:55:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:37,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425415440] [2021-07-09 17:55:37,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425415440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:37,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415355566] [2021-07-09 17:55:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2021-07-09 17:55:37,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:37,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415355566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:38,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:38,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:55:38,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55110587] [2021-07-09 17:55:38,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:38,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:38,033 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:38,357 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-07-09 17:55:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:55:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:38,539 INFO L225 Difference]: With dead ends: 19071 [2021-07-09 17:55:38,539 INFO L226 Difference]: Without dead ends: 19009 [2021-07-09 17:55:38,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-07-09 17:55:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-07-09 17:55:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-07-09 17:55:38,991 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-07-09 17:55:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:38,992 INFO L482 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-07-09 17:55:38,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-07-09 17:55:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:39,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:39,023 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:39,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:55:39,239 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:39,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1628603050, now seen corresponding path program 9 times [2021-07-09 17:55:39,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:39,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204626925] [2021-07-09 17:55:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:39,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:39,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204626925] [2021-07-09 17:55:39,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204626925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:39,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133508635] [2021-07-09 17:55:39,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-09 17:55:39,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:55:39,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:39,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:39,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:39,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133508635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:39,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:39,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:55:39,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852414272] [2021-07-09 17:55:39,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:39,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:39,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:39,382 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:39,860 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-07-09 17:55:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:55:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:39,976 INFO L225 Difference]: With dead ends: 25596 [2021-07-09 17:55:39,976 INFO L226 Difference]: Without dead ends: 25518 [2021-07-09 17:55:39,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-07-09 17:55:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-07-09 17:55:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-07-09 17:55:40,597 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-07-09 17:55:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:40,598 INFO L482 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-07-09 17:55:40,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-07-09 17:55:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:55:40,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:40,630 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:40,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:55:40,836 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:40,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1459493096, now seen corresponding path program 10 times [2021-07-09 17:55:40,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:40,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068921759] [2021-07-09 17:55:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:40,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068921759] [2021-07-09 17:55:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068921759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877065431] [2021-07-09 17:55:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:40,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:40,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877065431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:41,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:41,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:55:41,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107598393] [2021-07-09 17:55:41,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:55:41,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:41,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:55:41,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:55:41,016 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:41,570 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-07-09 17:55:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:55:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:55:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:41,653 INFO L225 Difference]: With dead ends: 25214 [2021-07-09 17:55:41,653 INFO L226 Difference]: Without dead ends: 25094 [2021-07-09 17:55:41,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:55:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-07-09 17:55:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-07-09 17:55:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-07-09 17:55:42,332 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-07-09 17:55:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:42,332 INFO L482 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-07-09 17:55:42,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-07-09 17:55:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:55:42,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:42,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:42,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:42,585 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash 720718514, now seen corresponding path program 11 times [2021-07-09 17:55:42,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:42,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796624088] [2021-07-09 17:55:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:42,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:42,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796624088] [2021-07-09 17:55:42,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796624088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:42,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493263633] [2021-07-09 17:55:42,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-09 17:55:42,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:55:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:42,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:55:42,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:42,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493263633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:42,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:42,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-09 17:55:42,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930891785] [2021-07-09 17:55:42,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:55:42,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:42,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:55:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:55:42,997 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:43,280 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-07-09 17:55:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:55:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 17:55:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:43,394 INFO L225 Difference]: With dead ends: 30028 [2021-07-09 17:55:43,394 INFO L226 Difference]: Without dead ends: 29440 [2021-07-09 17:55:43,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:55:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-07-09 17:55:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-07-09 17:55:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-07-09 17:55:44,214 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-07-09 17:55:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:44,214 INFO L482 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-07-09 17:55:44,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-07-09 17:55:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:55:44,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:44,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:44,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:44,473 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash -554854418, now seen corresponding path program 12 times [2021-07-09 17:55:44,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:44,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599513712] [2021-07-09 17:55:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:44,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599513712] [2021-07-09 17:55:44,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599513712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048064771] [2021-07-09 17:55:44,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-09 17:55:44,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:55:44,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:44,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:55:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:44,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048064771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:44,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:44,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-09 17:55:44,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602452013] [2021-07-09 17:55:44,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:55:44,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:55:44,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:55:44,723 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:45,433 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-07-09 17:55:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:55:45,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 17:55:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:46,024 INFO L225 Difference]: With dead ends: 60940 [2021-07-09 17:55:46,024 INFO L226 Difference]: Without dead ends: 58958 [2021-07-09 17:55:46,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-07-09 17:55:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-07-09 17:55:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-07-09 17:55:47,619 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-07-09 17:55:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:47,619 INFO L482 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-07-09 17:55:47,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-07-09 17:55:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:55:48,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:48,021 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:48,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:55:48,237 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:48,239 INFO L82 PathProgramCache]: Analyzing trace with hash -403396494, now seen corresponding path program 13 times [2021-07-09 17:55:48,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:48,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821793156] [2021-07-09 17:55:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:48,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:48,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821793156] [2021-07-09 17:55:48,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821793156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:48,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567932200] [2021-07-09 17:55:48,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:55:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:48,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567932200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:48,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:48,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-09 17:55:48,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546426376] [2021-07-09 17:55:48,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:55:48,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:48,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:55:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:55:48,442 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:49,225 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-07-09 17:55:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:55:49,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 17:55:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:49,528 INFO L225 Difference]: With dead ends: 60941 [2021-07-09 17:55:49,529 INFO L226 Difference]: Without dead ends: 60279 [2021-07-09 17:55:49,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:55:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-07-09 17:55:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-07-09 17:55:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-07-09 17:55:52,015 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-07-09 17:55:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:52,015 INFO L482 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-07-09 17:55:52,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-07-09 17:55:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:52,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:52,227 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:52,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:52,429 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1103617456, now seen corresponding path program 14 times [2021-07-09 17:55:52,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:52,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562189314] [2021-07-09 17:55:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:52,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:52,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562189314] [2021-07-09 17:55:52,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562189314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:52,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004549745] [2021-07-09 17:55:52,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:52,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:52,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:55:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:52,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004549745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:52,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:52,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:55:52,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070602695] [2021-07-09 17:55:52,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:55:52,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:55:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:55:52,773 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:54,756 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-07-09 17:55:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:55:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:55:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:55,581 INFO L225 Difference]: With dead ends: 115835 [2021-07-09 17:55:55,581 INFO L226 Difference]: Without dead ends: 115835 [2021-07-09 17:55:55,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:55:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-07-09 17:55:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-07-09 17:55:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-07-09 17:55:58,760 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-07-09 17:55:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:58,760 INFO L482 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-07-09 17:55:58,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-07-09 17:55:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:55:58,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:58,904 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:59,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:55:59,113 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:59,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2089929332, now seen corresponding path program 15 times [2021-07-09 17:55:59,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:59,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094472668] [2021-07-09 17:55:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:59,547 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 17:55:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:59,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094472668] [2021-07-09 17:55:59,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094472668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914556484] [2021-07-09 17:55:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-09 17:55:59,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:55:59,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:59,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:55:59,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:59,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914556484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:59,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:59,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:55:59,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854951112] [2021-07-09 17:55:59,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:55:59,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:55:59,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:55:59,761 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:01,799 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-07-09 17:56:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:56:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:03,123 INFO L225 Difference]: With dead ends: 148781 [2021-07-09 17:56:03,124 INFO L226 Difference]: Without dead ends: 147463 [2021-07-09 17:56:03,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 918.6ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:56:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-07-09 17:56:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-07-09 17:56:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-07-09 17:56:07,252 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-07-09 17:56:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:07,252 INFO L482 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-07-09 17:56:07,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-07-09 17:56:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:07,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:07,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:08,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:08,098 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1053355276, now seen corresponding path program 16 times [2021-07-09 17:56:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:08,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489951190] [2021-07-09 17:56:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:08,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:08,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489951190] [2021-07-09 17:56:08,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489951190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:08,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513237480] [2021-07-09 17:56:08,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:56:08,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:08,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:56:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:08,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513237480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:08,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:08,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 17:56:08,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616797452] [2021-07-09 17:56:08,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:56:08,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:08,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:56:08,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:56:08,278 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:10,568 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-07-09 17:56:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:56:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:11,956 INFO L225 Difference]: With dead ends: 170107 [2021-07-09 17:56:11,957 INFO L226 Difference]: Without dead ends: 170087 [2021-07-09 17:56:11,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:56:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-07-09 17:56:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-07-09 17:56:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-07-09 17:56:18,451 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-07-09 17:56:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:18,452 INFO L482 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-07-09 17:56:18,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-07-09 17:56:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:18,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:18,759 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:18,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:56:18,975 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash -405452624, now seen corresponding path program 17 times [2021-07-09 17:56:18,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:18,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663759249] [2021-07-09 17:56:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:19,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:19,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663759249] [2021-07-09 17:56:19,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663759249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:19,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341291663] [2021-07-09 17:56:19,081 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 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 [2021-07-09 17:56:19,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:56:19,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:56:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:19,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341291663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:19,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:19,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 17:56:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715381016] [2021-07-09 17:56:19,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:56:19,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:56:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:56:19,243 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:19,673 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-07-09 17:56:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:21,311 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-07-09 17:56:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:22,697 INFO L225 Difference]: With dead ends: 140554 [2021-07-09 17:56:22,697 INFO L226 Difference]: Without dead ends: 140250 [2021-07-09 17:56:22,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:56:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-07-09 17:56:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-07-09 17:56:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-07-09 17:56:27,821 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-07-09 17:56:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:27,821 INFO L482 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-07-09 17:56:27,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-07-09 17:56:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:28,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:28,066 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:28,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:56:28,273 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458894, now seen corresponding path program 18 times [2021-07-09 17:56:28,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:28,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026595004] [2021-07-09 17:56:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:56:28,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:28,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026595004] [2021-07-09 17:56:28,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026595004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:28,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645508436] [2021-07-09 17:56:28,318 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 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 [2021-07-09 17:56:28,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:56:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:56:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:28,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645508436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:28,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:28,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 17:56:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808850335] [2021-07-09 17:56:28,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:56:28,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:56:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:56:28,484 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:30,735 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-07-09 17:56:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:56:30,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:32,340 INFO L225 Difference]: With dead ends: 157433 [2021-07-09 17:56:32,341 INFO L226 Difference]: Without dead ends: 156538 [2021-07-09 17:56:32,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:56:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-07-09 17:56:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-07-09 17:56:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-07-09 17:56:39,211 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-07-09 17:56:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:39,211 INFO L482 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-07-09 17:56:39,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-07-09 17:56:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:39,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:39,466 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:39,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:56:39,682 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:39,682 INFO L82 PathProgramCache]: Analyzing trace with hash -564059436, now seen corresponding path program 19 times [2021-07-09 17:56:39,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:39,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768196598] [2021-07-09 17:56:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:39,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:39,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768196598] [2021-07-09 17:56:39,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768196598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:39,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804190525] [2021-07-09 17:56:39,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-09 17:56:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:56:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:39,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804190525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:39,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:39,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 17:56:39,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337797104] [2021-07-09 17:56:39,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:56:39,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:56:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:56:39,891 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:42,555 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-07-09 17:56:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:56:42,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:44,024 INFO L225 Difference]: With dead ends: 192417 [2021-07-09 17:56:44,024 INFO L226 Difference]: Without dead ends: 191725 [2021-07-09 17:56:44,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:56:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-07-09 17:56:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-07-09 17:56:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-07-09 17:56:50,715 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-07-09 17:56:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:50,715 INFO L482 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-07-09 17:56:50,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-07-09 17:56:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:56:51,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:51,419 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:51,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:56:51,629 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:51,629 INFO L82 PathProgramCache]: Analyzing trace with hash -689678634, now seen corresponding path program 20 times [2021-07-09 17:56:51,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:51,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093419719] [2021-07-09 17:56:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:56:51,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:51,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093419719] [2021-07-09 17:56:51,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093419719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:51,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066715948] [2021-07-09 17:56:51,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-09 17:56:51,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:51,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:51,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:56:51,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:51,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066715948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:51,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:51,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:56:51,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018806562] [2021-07-09 17:56:51,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:56:51,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:51,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:56:51,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:56:51,924 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:55,602 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-07-09 17:56:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:56:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:56:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:57,220 INFO L225 Difference]: With dead ends: 221192 [2021-07-09 17:56:57,220 INFO L226 Difference]: Without dead ends: 221192 [2021-07-09 17:56:57,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:56:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-07-09 17:57:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-07-09 17:57:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-07-09 17:57:04,847 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-07-09 17:57:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:04,847 INFO L482 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-07-09 17:57:04,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-07-09 17:57:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:05,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:05,496 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:05,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:57:05,700 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash -26712938, now seen corresponding path program 21 times [2021-07-09 17:57:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:05,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702846131] [2021-07-09 17:57:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:05,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:05,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702846131] [2021-07-09 17:57:05,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702846131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:05,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881716218] [2021-07-09 17:57:05,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-09 17:57:05,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:57:05,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:05,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881716218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:05,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:05,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 17:57:05,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257639474] [2021-07-09 17:57:05,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:57:05,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:05,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:57:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:57:05,937 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:08,383 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-07-09 17:57:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:57:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:09,803 INFO L225 Difference]: With dead ends: 149434 [2021-07-09 17:57:09,804 INFO L226 Difference]: Without dead ends: 149030 [2021-07-09 17:57:09,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-07-09 17:57:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-07-09 17:57:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-07-09 17:57:15,182 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-07-09 17:57:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:15,182 INFO L482 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-07-09 17:57:15,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-07-09 17:57:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:15,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:15,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:16,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:16,053 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash -498320652, now seen corresponding path program 22 times [2021-07-09 17:57:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:16,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85088802] [2021-07-09 17:57:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:16,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:16,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85088802] [2021-07-09 17:57:16,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85088802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250511848] [2021-07-09 17:57:16,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:16,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:16,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:16,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:16,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:16,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250511848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:16,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 17:57:16,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684201356] [2021-07-09 17:57:16,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:57:16,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:57:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:57:16,231 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:20,500 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-07-09 17:57:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:57:20,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:22,439 INFO L225 Difference]: With dead ends: 262218 [2021-07-09 17:57:22,439 INFO L226 Difference]: Without dead ends: 262218 [2021-07-09 17:57:22,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:57:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-07-09 17:57:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-07-09 17:57:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-07-09 17:57:34,136 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-07-09 17:57:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:34,136 INFO L482 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-07-09 17:57:34,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-07-09 17:57:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:34,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:34,900 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:35,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:57:35,117 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2046213610, now seen corresponding path program 23 times [2021-07-09 17:57:35,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:35,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111244996] [2021-07-09 17:57:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:35,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:35,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111244996] [2021-07-09 17:57:35,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111244996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:35,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919194217] [2021-07-09 17:57:35,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:35,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:57:35,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:35,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919194217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:35,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:35,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 17:57:35,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496323803] [2021-07-09 17:57:35,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:57:35,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:57:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:57:35,317 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:38,910 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-07-09 17:57:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:57:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:40,875 INFO L225 Difference]: With dead ends: 254683 [2021-07-09 17:57:40,875 INFO L226 Difference]: Without dead ends: 254373 [2021-07-09 17:57:40,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:57:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-07-09 17:57:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-07-09 17:57:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-07-09 17:57:52,389 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-07-09 17:57:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:52,389 INFO L482 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-07-09 17:57:52,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-07-09 17:57:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:57:52,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:52,763 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:52,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:52,977 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1041882536, now seen corresponding path program 24 times [2021-07-09 17:57:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:52,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737809768] [2021-07-09 17:57:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:53,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:53,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737809768] [2021-07-09 17:57:53,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737809768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:53,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679523112] [2021-07-09 17:57:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:53,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:57:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:53,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:53,463 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 17:57:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:53,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679523112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:53,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:53,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 17:57:53,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722465652] [2021-07-09 17:57:53,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:57:53,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:53,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:57:53,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:57:53,471 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:58,127 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-07-09 17:57:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:57:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:57:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:00,889 INFO L225 Difference]: With dead ends: 283294 [2021-07-09 17:58:00,889 INFO L226 Difference]: Without dead ends: 282784 [2021-07-09 17:58:00,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:58:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-07-09 17:58:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-07-09 17:58:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-07-09 17:58:13,149 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-07-09 17:58:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:13,149 INFO L482 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-07-09 17:58:13,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-07-09 17:58:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:58:13,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:13,886 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:14,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:58:14,102 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:14,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1862781996, now seen corresponding path program 25 times [2021-07-09 17:58:14,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:14,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318586197] [2021-07-09 17:58:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:14,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:14,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318586197] [2021-07-09 17:58:14,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318586197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:14,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787861740] [2021-07-09 17:58:14,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-09 17:58:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:14,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:58:14,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:14,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787861740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:14,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:14,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:58:14,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780173325] [2021-07-09 17:58:14,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:58:14,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:14,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:58:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:58:14,414 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:18,845 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-07-09 17:58:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:58:18,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:58:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:21,064 INFO L225 Difference]: With dead ends: 290122 [2021-07-09 17:58:21,064 INFO L226 Difference]: Without dead ends: 289652 [2021-07-09 17:58:21,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 549.7ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:58:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-07-09 17:58:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-07-09 17:58:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-07-09 17:58:35,097 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-07-09 17:58:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:35,098 INFO L482 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-07-09 17:58:35,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-07-09 17:58:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:58:35,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:35,873 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:36,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:58:36,090 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash 688625138, now seen corresponding path program 26 times [2021-07-09 17:58:36,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:36,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953966290] [2021-07-09 17:58:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:36,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:36,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953966290] [2021-07-09 17:58:36,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953966290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:36,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077218378] [2021-07-09 17:58:36,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-09 17:58:36,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:36,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:58:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:36,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077218378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:36,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:36,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-07-09 17:58:36,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152161981] [2021-07-09 17:58:36,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:58:36,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:58:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:58:36,453 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:41,639 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-07-09 17:58:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:58:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:58:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:44,035 INFO L225 Difference]: With dead ends: 275767 [2021-07-09 17:58:44,035 INFO L226 Difference]: Without dead ends: 274998 [2021-07-09 17:58:44,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:58:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-07-09 17:58:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-07-09 17:58:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-07-09 17:58:58,904 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-07-09 17:58:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:58,904 INFO L482 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-07-09 17:58:58,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-07-09 17:58:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:58:59,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:59,783 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:59,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:58:59,999 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1727044438, now seen corresponding path program 27 times [2021-07-09 17:58:59,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:59,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840823639] [2021-07-09 17:59:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:59:00,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:00,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840823639] [2021-07-09 17:59:00,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840823639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:00,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843239608] [2021-07-09 17:59:00,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:59:00,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:59:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:59:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:00,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843239608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:00,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:00,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-07-09 17:59:00,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291170440] [2021-07-09 17:59:00,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:59:00,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:00,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:59:00,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:59:00,366 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:06,007 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-07-09 17:59:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:59:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:59:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:11,573 INFO L225 Difference]: With dead ends: 394201 [2021-07-09 17:59:11,573 INFO L226 Difference]: Without dead ends: 392734 [2021-07-09 17:59:11,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:59:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-07-09 17:59:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-07-09 17:59:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-07-09 17:59:32,901 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-07-09 17:59:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:32,901 INFO L482 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-07-09 17:59:32,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-07-09 17:59:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:59:33,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:33,982 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:34,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:59:34,198 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:34,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-07-09 17:59:34,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:34,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553593117] [2021-07-09 17:59:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:59:34,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553593117] [2021-07-09 17:59:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553593117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177655029] [2021-07-09 17:59:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:59:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:59:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:34,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177655029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:34,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:34,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-07-09 17:59:34,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061868922] [2021-07-09 17:59:34,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:59:34,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:34,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:59:34,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:59:34,400 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:44,184 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-07-09 17:59:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:59:44,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:59:44,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:49,634 INFO L225 Difference]: With dead ends: 586179 [2021-07-09 17:59:49,635 INFO L226 Difference]: Without dead ends: 583951 [2021-07-09 17:59:49,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:59:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-07-09 18:00:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-07-09 18:00:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)