/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:19:36,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:19:36,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:19:36,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:19:36,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:19:36,679 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:19:36,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:19:36,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:19:36,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:19:36,686 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:19:36,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:19:36,687 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:19:36,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:19:36,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:19:36,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:19:36,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:19:36,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:19:36,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:19:36,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:19:36,688 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:19:36,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:19:36,689 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:19:36,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:19:36,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:19:36,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:19:36,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:19:36,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:19:36,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:19:36,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:19:36,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:19:36,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:19:36,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:19:36,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:19:36,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:19:36,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:19:36,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:19:36,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:19:36,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:19:36,964 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:19:36,965 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:19:36,966 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-11-23 21:19:37,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d96eb394/0bad5bd5ce4b45ebbfd9b1cbc5cd1559/FLAG09a8a78b7 [2019-11-23 21:19:37,620 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:19:37,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-11-23 21:19:37,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d96eb394/0bad5bd5ce4b45ebbfd9b1cbc5cd1559/FLAG09a8a78b7 [2019-11-23 21:19:37,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d96eb394/0bad5bd5ce4b45ebbfd9b1cbc5cd1559 [2019-11-23 21:19:37,785 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:19:37,787 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:19:37,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:37,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:19:37,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:19:37,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:37" (1/1) ... [2019-11-23 21:19:37,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@266cb4d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:37, skipping insertion in model container [2019-11-23 21:19:37,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:37" (1/1) ... [2019-11-23 21:19:37,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:19:37,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:19:38,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:38,724 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:19:39,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:39,072 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:19:39,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39 WrapperNode [2019-11-23 21:19:39,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:39,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:39,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:19:39,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:19:39,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:39,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:19:39,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:19:39,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:19:39,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (1/1) ... [2019-11-23 21:19:39,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:19:39,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:19:39,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:19:39,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:19:39,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (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 [2019-11-23 21:19:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:19:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:19:41,822 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:19:41,822 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:19:41,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:41 BoogieIcfgContainer [2019-11-23 21:19:41,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:19:41,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:19:41,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:19:41,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:19:41,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:37" (1/3) ... [2019-11-23 21:19:41,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad11212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:41, skipping insertion in model container [2019-11-23 21:19:41,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:39" (2/3) ... [2019-11-23 21:19:41,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad11212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:41, skipping insertion in model container [2019-11-23 21:19:41,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:41" (3/3) ... [2019-11-23 21:19:41,832 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label36.c [2019-11-23 21:19:41,842 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:19:41,853 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:19:41,864 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:19:41,909 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:19:41,910 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:19:41,910 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:19:41,910 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:19:41,910 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:19:41,911 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:19:41,911 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:19:41,912 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:19:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2019-11-23 21:19:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 21:19:41,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:41,955 INFO L410 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, 1, 1, 1, 1] [2019-11-23 21:19:41,955 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2019-11-23 21:19:41,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:41,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927417920] [2019-11-23 21:19:41,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:19:42,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927417920] [2019-11-23 21:19:42,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:42,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:19:42,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762748648] [2019-11-23 21:19:42,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:19:42,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:42,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:19:42,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:19:42,560 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 7 states. [2019-11-23 21:19:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:48,479 INFO L93 Difference]: Finished difference Result 1815 states and 3471 transitions. [2019-11-23 21:19:48,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:19:48,481 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-23 21:19:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:48,509 INFO L225 Difference]: With dead ends: 1815 [2019-11-23 21:19:48,509 INFO L226 Difference]: Without dead ends: 1342 [2019-11-23 21:19:48,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:19:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2019-11-23 21:19:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 991. [2019-11-23 21:19:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-11-23 21:19:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1483 transitions. [2019-11-23 21:19:48,621 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1483 transitions. Word has length 36 [2019-11-23 21:19:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:48,621 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1483 transitions. [2019-11-23 21:19:48,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:19:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1483 transitions. [2019-11-23 21:19:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-23 21:19:48,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:48,633 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:19:48,634 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash -238590118, now seen corresponding path program 1 times [2019-11-23 21:19:48,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:48,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436979930] [2019-11-23 21:19:48,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 21:19:48,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436979930] [2019-11-23 21:19:48,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:48,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:19:48,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268820780] [2019-11-23 21:19:48,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:48,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:48,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:48,995 INFO L87 Difference]: Start difference. First operand 991 states and 1483 transitions. Second operand 4 states. [2019-11-23 21:19:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:51,074 INFO L93 Difference]: Finished difference Result 2638 states and 4103 transitions. [2019-11-23 21:19:51,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:51,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 226 [2019-11-23 21:19:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:51,085 INFO L225 Difference]: With dead ends: 2638 [2019-11-23 21:19:51,086 INFO L226 Difference]: Without dead ends: 1649 [2019-11-23 21:19:51,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2019-11-23 21:19:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2019-11-23 21:19:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2019-11-23 21:19:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2382 transitions. [2019-11-23 21:19:51,152 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2382 transitions. Word has length 226 [2019-11-23 21:19:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:51,155 INFO L462 AbstractCegarLoop]: Abstraction has 1649 states and 2382 transitions. [2019-11-23 21:19:51,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2382 transitions. [2019-11-23 21:19:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-11-23 21:19:51,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:51,167 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:51,168 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:51,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1431890043, now seen corresponding path program 1 times [2019-11-23 21:19:51,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:51,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515802468] [2019-11-23 21:19:51,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 21:19:51,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515802468] [2019-11-23 21:19:51,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:51,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:51,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428473416] [2019-11-23 21:19:51,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:51,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:51,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:51,460 INFO L87 Difference]: Start difference. First operand 1649 states and 2382 transitions. Second operand 4 states. [2019-11-23 21:19:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:54,144 INFO L93 Difference]: Finished difference Result 4612 states and 6546 transitions. [2019-11-23 21:19:54,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:54,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2019-11-23 21:19:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:54,157 INFO L225 Difference]: With dead ends: 4612 [2019-11-23 21:19:54,157 INFO L226 Difference]: Without dead ends: 2636 [2019-11-23 21:19:54,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2019-11-23 21:19:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2019-11-23 21:19:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-11-23 21:19:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 2855 transitions. [2019-11-23 21:19:54,243 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 2855 transitions. Word has length 337 [2019-11-23 21:19:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:54,246 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 2855 transitions. [2019-11-23 21:19:54,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 2855 transitions. [2019-11-23 21:19:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2019-11-23 21:19:54,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:54,281 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:54,281 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 624047901, now seen corresponding path program 1 times [2019-11-23 21:19:54,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:54,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804573051] [2019-11-23 21:19:54,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 639 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-11-23 21:19:54,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804573051] [2019-11-23 21:19:54,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:54,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:54,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480109979] [2019-11-23 21:19:54,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:54,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:54,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:54,905 INFO L87 Difference]: Start difference. First operand 2636 states and 2855 transitions. Second operand 4 states. [2019-11-23 21:19:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:56,919 INFO L93 Difference]: Finished difference Result 8231 states and 8981 transitions. [2019-11-23 21:19:56,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:56,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 613 [2019-11-23 21:19:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:56,948 INFO L225 Difference]: With dead ends: 8231 [2019-11-23 21:19:56,948 INFO L226 Difference]: Without dead ends: 5926 [2019-11-23 21:19:56,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2019-11-23 21:19:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 4939. [2019-11-23 21:19:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4939 states. [2019-11-23 21:19:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5297 transitions. [2019-11-23 21:19:57,052 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5297 transitions. Word has length 613 [2019-11-23 21:19:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:57,053 INFO L462 AbstractCegarLoop]: Abstraction has 4939 states and 5297 transitions. [2019-11-23 21:19:57,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5297 transitions. [2019-11-23 21:19:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2019-11-23 21:19:57,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:57,090 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2019-11-23 21:19:57,091 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:57,091 INFO L82 PathProgramCache]: Analyzing trace with hash -662454887, now seen corresponding path program 1 times [2019-11-23 21:19:57,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:57,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439764846] [2019-11-23 21:19:57,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 1034 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2019-11-23 21:19:58,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439764846] [2019-11-23 21:19:58,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:58,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:58,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668488587] [2019-11-23 21:19:58,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:58,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:58,105 INFO L87 Difference]: Start difference. First operand 4939 states and 5297 transitions. Second operand 4 states. [2019-11-23 21:20:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:00,058 INFO L93 Difference]: Finished difference Result 12508 states and 13528 transitions. [2019-11-23 21:20:00,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:00,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 837 [2019-11-23 21:20:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:00,093 INFO L225 Difference]: With dead ends: 12508 [2019-11-23 21:20:00,094 INFO L226 Difference]: Without dead ends: 7900 [2019-11-23 21:20:00,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2019-11-23 21:20:00,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7900. [2019-11-23 21:20:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2019-11-23 21:20:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8413 transitions. [2019-11-23 21:20:00,217 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8413 transitions. Word has length 837 [2019-11-23 21:20:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:00,218 INFO L462 AbstractCegarLoop]: Abstraction has 7900 states and 8413 transitions. [2019-11-23 21:20:00,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8413 transitions. [2019-11-23 21:20:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2019-11-23 21:20:00,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:00,233 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2019-11-23 21:20:00,234 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1439088896, now seen corresponding path program 1 times [2019-11-23 21:20:00,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:00,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881039192] [2019-11-23 21:20:00,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2019-11-23 21:20:01,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881039192] [2019-11-23 21:20:01,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:01,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:01,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334097208] [2019-11-23 21:20:01,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:01,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:01,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:01,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:01,483 INFO L87 Difference]: Start difference. First operand 7900 states and 8413 transitions. Second operand 4 states. [2019-11-23 21:20:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:03,350 INFO L93 Difference]: Finished difference Result 17443 states and 18528 transitions. [2019-11-23 21:20:03,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:03,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 872 [2019-11-23 21:20:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:03,383 INFO L225 Difference]: With dead ends: 17443 [2019-11-23 21:20:03,383 INFO L226 Difference]: Without dead ends: 8887 [2019-11-23 21:20:03,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2019-11-23 21:20:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 7900. [2019-11-23 21:20:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2019-11-23 21:20:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8230 transitions. [2019-11-23 21:20:03,497 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8230 transitions. Word has length 872 [2019-11-23 21:20:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:03,499 INFO L462 AbstractCegarLoop]: Abstraction has 7900 states and 8230 transitions. [2019-11-23 21:20:03,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8230 transitions. [2019-11-23 21:20:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1113 [2019-11-23 21:20:03,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:03,520 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:03,521 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:03,521 INFO L82 PathProgramCache]: Analyzing trace with hash -451266042, now seen corresponding path program 1 times [2019-11-23 21:20:03,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:03,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614221030] [2019-11-23 21:20:03,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 1825 proven. 38 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-11-23 21:20:06,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614221030] [2019-11-23 21:20:06,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322625945] [2019-11-23 21:20:06,062 INFO L94 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 [2019-11-23 21:20:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:06,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:20:06,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 1422 proven. 0 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2019-11-23 21:20:07,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:07,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-11-23 21:20:07,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975140713] [2019-11-23 21:20:07,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:07,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:07,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:20:07,153 INFO L87 Difference]: Start difference. First operand 7900 states and 8230 transitions. Second operand 3 states. [2019-11-23 21:20:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:08,378 INFO L93 Difference]: Finished difference Result 15469 states and 16127 transitions. [2019-11-23 21:20:08,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:08,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1112 [2019-11-23 21:20:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:08,418 INFO L225 Difference]: With dead ends: 15469 [2019-11-23 21:20:08,419 INFO L226 Difference]: Without dead ends: 7900 [2019-11-23 21:20:08,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 1112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:20:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2019-11-23 21:20:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7900. [2019-11-23 21:20:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2019-11-23 21:20:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8212 transitions. [2019-11-23 21:20:08,537 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8212 transitions. Word has length 1112 [2019-11-23 21:20:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:08,538 INFO L462 AbstractCegarLoop]: Abstraction has 7900 states and 8212 transitions. [2019-11-23 21:20:08,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8212 transitions. [2019-11-23 21:20:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1395 [2019-11-23 21:20:08,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:08,570 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:08,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:08,776 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash -786433751, now seen corresponding path program 1 times [2019-11-23 21:20:08,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:08,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863364309] [2019-11-23 21:20:08,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 2739 proven. 38 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2019-11-23 21:20:12,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863364309] [2019-11-23 21:20:12,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604608243] [2019-11-23 21:20:12,055 INFO L94 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 [2019-11-23 21:20:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:12,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:20:12,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 2460 proven. 0 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2019-11-23 21:20:13,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:13,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-11-23 21:20:13,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354404759] [2019-11-23 21:20:13,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:13,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:20:13,207 INFO L87 Difference]: Start difference. First operand 7900 states and 8212 transitions. Second operand 3 states. [2019-11-23 21:20:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:14,744 INFO L93 Difference]: Finished difference Result 15798 states and 16432 transitions. [2019-11-23 21:20:14,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:14,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1394 [2019-11-23 21:20:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:14,763 INFO L225 Difference]: With dead ends: 15798 [2019-11-23 21:20:14,763 INFO L226 Difference]: Without dead ends: 8229 [2019-11-23 21:20:14,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1394 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:20:14,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2019-11-23 21:20:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2019-11-23 21:20:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2019-11-23 21:20:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8499 transitions. [2019-11-23 21:20:14,865 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8499 transitions. Word has length 1394 [2019-11-23 21:20:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:14,867 INFO L462 AbstractCegarLoop]: Abstraction has 8229 states and 8499 transitions. [2019-11-23 21:20:14,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8499 transitions. [2019-11-23 21:20:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1684 [2019-11-23 21:20:14,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:14,915 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:15,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:15,131 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:15,131 INFO L82 PathProgramCache]: Analyzing trace with hash 122607251, now seen corresponding path program 1 times [2019-11-23 21:20:15,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:15,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016088553] [2019-11-23 21:20:15,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5135 backedges. 3287 proven. 0 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2019-11-23 21:20:18,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016088553] [2019-11-23 21:20:18,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:18,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:18,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872327537] [2019-11-23 21:20:18,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:18,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:18,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:18,211 INFO L87 Difference]: Start difference. First operand 8229 states and 8499 transitions. Second operand 4 states. [2019-11-23 21:20:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:19,966 INFO L93 Difference]: Finished difference Result 19746 states and 20405 transitions. [2019-11-23 21:20:19,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:19,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1683 [2019-11-23 21:20:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:19,987 INFO L225 Difference]: With dead ends: 19746 [2019-11-23 21:20:19,988 INFO L226 Difference]: Without dead ends: 11848 [2019-11-23 21:20:19,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2019-11-23 21:20:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11519. [2019-11-23 21:20:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11519 states. [2019-11-23 21:20:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11830 transitions. [2019-11-23 21:20:20,149 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11830 transitions. Word has length 1683 [2019-11-23 21:20:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:20,150 INFO L462 AbstractCegarLoop]: Abstraction has 11519 states and 11830 transitions. [2019-11-23 21:20:20,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11830 transitions. [2019-11-23 21:20:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1745 [2019-11-23 21:20:20,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:20,191 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:20:20,191 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:20,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1462311327, now seen corresponding path program 1 times [2019-11-23 21:20:20,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:20,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372646840] [2019-11-23 21:20:20,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 3598 proven. 0 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2019-11-23 21:20:23,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372646840] [2019-11-23 21:20:23,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:23,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:20:23,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742954286] [2019-11-23 21:20:23,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:20:23,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:20:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:20:23,750 INFO L87 Difference]: Start difference. First operand 11519 states and 11830 transitions. Second operand 6 states. [2019-11-23 21:20:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:26,499 INFO L93 Difference]: Finished difference Result 23374 states and 24014 transitions. [2019-11-23 21:20:26,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:20:26,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1744 [2019-11-23 21:20:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:26,520 INFO L225 Difference]: With dead ends: 23374 [2019-11-23 21:20:26,521 INFO L226 Difference]: Without dead ends: 12186 [2019-11-23 21:20:26,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:20:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12186 states. [2019-11-23 21:20:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12186 to 11848. [2019-11-23 21:20:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11848 states. [2019-11-23 21:20:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12167 transitions. [2019-11-23 21:20:26,657 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12167 transitions. Word has length 1744 [2019-11-23 21:20:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:26,658 INFO L462 AbstractCegarLoop]: Abstraction has 11848 states and 12167 transitions. [2019-11-23 21:20:26,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:20:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12167 transitions. [2019-11-23 21:20:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1764 [2019-11-23 21:20:26,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:26,712 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 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, 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, 1] [2019-11-23 21:20:26,712 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1764878195, now seen corresponding path program 1 times [2019-11-23 21:20:26,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:26,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217952135] [2019-11-23 21:20:26,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5397 backedges. 4053 proven. 359 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2019-11-23 21:20:30,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217952135] [2019-11-23 21:20:30,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362372678] [2019-11-23 21:20:30,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:30,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 2024 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:20:30,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5397 backedges. 2366 proven. 0 refuted. 0 times theorem prover too weak. 3031 trivial. 0 not checked. [2019-11-23 21:20:33,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:33,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2019-11-23 21:20:33,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081377205] [2019-11-23 21:20:33,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:33,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:33,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:33,339 INFO L87 Difference]: Start difference. First operand 11848 states and 12167 transitions. Second operand 3 states. [2019-11-23 21:20:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:34,387 INFO L93 Difference]: Finished difference Result 23365 states and 24001 transitions. [2019-11-23 21:20:34,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:34,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1763 [2019-11-23 21:20:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:34,399 INFO L225 Difference]: With dead ends: 23365 [2019-11-23 21:20:34,399 INFO L226 Difference]: Without dead ends: 11848 [2019-11-23 21:20:34,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1764 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2019-11-23 21:20:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11848. [2019-11-23 21:20:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11848 states. [2019-11-23 21:20:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12166 transitions. [2019-11-23 21:20:34,545 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12166 transitions. Word has length 1763 [2019-11-23 21:20:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:34,546 INFO L462 AbstractCegarLoop]: Abstraction has 11848 states and 12166 transitions. [2019-11-23 21:20:34,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12166 transitions. [2019-11-23 21:20:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1794 [2019-11-23 21:20:34,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:34,603 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1] [2019-11-23 21:20:34,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:34,812 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1703685810, now seen corresponding path program 1 times [2019-11-23 21:20:34,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:34,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054413001] [2019-11-23 21:20:34,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6122 backedges. 2359 proven. 157 refuted. 0 times theorem prover too weak. 3606 trivial. 0 not checked. [2019-11-23 21:20:37,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054413001] [2019-11-23 21:20:37,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329963038] [2019-11-23 21:20:37,932 INFO L94 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 [2019-11-23 21:20:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:38,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:20:38,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6122 backedges. 2516 proven. 0 refuted. 0 times theorem prover too weak. 3606 trivial. 0 not checked. [2019-11-23 21:20:39,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:39,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2019-11-23 21:20:39,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815741625] [2019-11-23 21:20:39,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:39,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:39,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:39,999 INFO L87 Difference]: Start difference. First operand 11848 states and 12166 transitions. Second operand 3 states. [2019-11-23 21:20:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:41,217 INFO L93 Difference]: Finished difference Result 24681 states and 25355 transitions. [2019-11-23 21:20:41,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:41,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1793 [2019-11-23 21:20:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:41,228 INFO L225 Difference]: With dead ends: 24681 [2019-11-23 21:20:41,229 INFO L226 Difference]: Without dead ends: 13164 [2019-11-23 21:20:41,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1801 GetRequests, 1792 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2019-11-23 21:20:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 12835. [2019-11-23 21:20:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2019-11-23 21:20:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13157 transitions. [2019-11-23 21:20:41,366 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13157 transitions. Word has length 1793 [2019-11-23 21:20:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:41,367 INFO L462 AbstractCegarLoop]: Abstraction has 12835 states and 13157 transitions. [2019-11-23 21:20:41,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13157 transitions. [2019-11-23 21:20:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2094 [2019-11-23 21:20:41,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:41,404 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:20:41,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:41,617 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1861037178, now seen corresponding path program 1 times [2019-11-23 21:20:41,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:41,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802343954] [2019-11-23 21:20:41,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7920 backedges. 4289 proven. 1864 refuted. 0 times theorem prover too weak. 1767 trivial. 0 not checked. [2019-11-23 21:20:45,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802343954] [2019-11-23 21:20:45,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960519414] [2019-11-23 21:20:45,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 21:20:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:46,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 2402 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:20:46,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7920 backedges. 4422 proven. 0 refuted. 0 times theorem prover too weak. 3498 trivial. 0 not checked. [2019-11-23 21:20:47,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:47,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2019-11-23 21:20:47,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244596366] [2019-11-23 21:20:47,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:47,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:47,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:20:47,802 INFO L87 Difference]: Start difference. First operand 12835 states and 13157 transitions. Second operand 3 states. [2019-11-23 21:20:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:48,961 INFO L93 Difference]: Finished difference Result 25668 states and 26314 transitions. [2019-11-23 21:20:48,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:48,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2093 [2019-11-23 21:20:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:48,977 INFO L225 Difference]: With dead ends: 25668 [2019-11-23 21:20:48,977 INFO L226 Difference]: Without dead ends: 13164 [2019-11-23 21:20:48,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2104 GetRequests, 2093 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:20:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2019-11-23 21:20:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 12835. [2019-11-23 21:20:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2019-11-23 21:20:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13156 transitions. [2019-11-23 21:20:49,096 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13156 transitions. Word has length 2093 [2019-11-23 21:20:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:49,098 INFO L462 AbstractCegarLoop]: Abstraction has 12835 states and 13156 transitions. [2019-11-23 21:20:49,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13156 transitions. [2019-11-23 21:20:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2307 [2019-11-23 21:20:49,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:49,143 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 21:20:49,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:49,356 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash 693682285, now seen corresponding path program 1 times [2019-11-23 21:20:49,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:49,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647169792] [2019-11-23 21:20:49,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9226 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 8853 trivial. 0 not checked. [2019-11-23 21:20:52,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647169792] [2019-11-23 21:20:52,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:52,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:52,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422725241] [2019-11-23 21:20:52,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:52,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:52,277 INFO L87 Difference]: Start difference. First operand 12835 states and 13156 transitions. Second operand 4 states.