/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/Problem18_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:21:41,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:21:41,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:21:41,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:21:41,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:21:41,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:21:41,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:21:41,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:21:41,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:21:41,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:21:41,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:21:41,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:21:41,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:21:41,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:21:41,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:21:41,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:21:41,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:21:41,622 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 21:21:41,652 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:21:41,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:21:41,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:21:41,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:21:41,654 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:21:41,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:21:41,654 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:21:41,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:21:41,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:21:41,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:21:41,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:21:41,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:21:41,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:21:41,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:21:41,656 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:21:41,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:21:41,656 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:21:41,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:21:41,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:21:41,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:21:41,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:21:41,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:21:41,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:21:41,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:21:41,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:21:41,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:21:41,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:21:41,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:21:41,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:21:41,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:21:41,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:21:41,992 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:21:41,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:21:42,001 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:21:42,001 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:21:42,002 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label13.c [2019-11-23 21:21:42,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc6a588cd/62fa36a42f9d4098823b80fc64f0ef8d/FLAG3b0b600f5 [2019-11-23 21:21:42,798 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:21:42,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label13.c [2019-11-23 21:21:42,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc6a588cd/62fa36a42f9d4098823b80fc64f0ef8d/FLAG3b0b600f5 [2019-11-23 21:21:42,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc6a588cd/62fa36a42f9d4098823b80fc64f0ef8d [2019-11-23 21:21:42,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:21:42,939 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:21:42,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:21:42,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:21:42,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:21:42,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:42" (1/1) ... [2019-11-23 21:21:42,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bdfaca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:42, skipping insertion in model container [2019-11-23 21:21:42,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:42" (1/1) ... [2019-11-23 21:21:42,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:21:43,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:21:44,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:21:44,224 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:21:44,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:21:44,673 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:21:44,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44 WrapperNode [2019-11-23 21:21:44,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:21:44,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:21:44,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:21:44,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:21:44,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:44,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:44,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:21:44,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:21:44,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:21:44,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:21:45,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:45,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:45,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:45,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:45,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:45,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:45,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (1/1) ... [2019-11-23 21:21:45,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:21:45,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:21:45,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:21:45,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:21:45,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (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 21:21:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:21:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:21:49,642 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:21:49,642 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:21:49,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:49 BoogieIcfgContainer [2019-11-23 21:21:49,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:21:49,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:21:49,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:21:49,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:21:49,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:21:42" (1/3) ... [2019-11-23 21:21:49,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0f8e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:49, skipping insertion in model container [2019-11-23 21:21:49,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:44" (2/3) ... [2019-11-23 21:21:49,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0f8e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:49, skipping insertion in model container [2019-11-23 21:21:49,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:49" (3/3) ... [2019-11-23 21:21:49,662 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label13.c [2019-11-23 21:21:49,674 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:21:49,687 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:21:49,704 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:21:49,772 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:21:49,772 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:21:49,772 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:21:49,773 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:21:49,773 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:21:49,774 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:21:49,774 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:21:49,774 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:21:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:21:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 21:21:49,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:21:49,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:21:49,824 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:21:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:21:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2019-11-23 21:21:49,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:21:49,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202126315] [2019-11-23 21:21:49,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:21:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:21:50,199 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 21:21:50,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202126315] [2019-11-23 21:21:50,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:21:50,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:21:50,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792247463] [2019-11-23 21:21:50,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:21:50,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:21:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:21:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:21:50,234 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:21:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:21:57,516 INFO L93 Difference]: Finished difference Result 2914 states and 5662 transitions. [2019-11-23 21:21:57,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:21:57,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-11-23 21:21:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:21:57,555 INFO L225 Difference]: With dead ends: 2914 [2019-11-23 21:21:57,555 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:21:57,564 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 21:21:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:21:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:21:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:21:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3262 transitions. [2019-11-23 21:21:57,729 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3262 transitions. Word has length 45 [2019-11-23 21:21:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:21:57,730 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3262 transitions. [2019-11-23 21:21:57,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:21:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3262 transitions. [2019-11-23 21:21:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-23 21:21:57,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:21:57,741 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-11-23 21:21:57,742 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:21:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:21:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash -771686150, now seen corresponding path program 1 times [2019-11-23 21:21:57,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:21:57,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411723454] [2019-11-23 21:21:57,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:21:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:21:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:21:57,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411723454] [2019-11-23 21:21:57,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:21:57,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:21:57,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633944017] [2019-11-23 21:21:57,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:21:57,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:21:57,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:21:57,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:21:57,872 INFO L87 Difference]: Start difference. First operand 2074 states and 3262 transitions. Second operand 4 states. [2019-11-23 21:22:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:02,156 INFO L93 Difference]: Finished difference Result 6216 states and 9781 transitions. [2019-11-23 21:22:02,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:02,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2019-11-23 21:22:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:02,185 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:22:02,185 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:22:02,191 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 21:22:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:22:02,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:22:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:22:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5537 transitions. [2019-11-23 21:22:02,311 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5537 transitions. Word has length 110 [2019-11-23 21:22:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:02,314 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5537 transitions. [2019-11-23 21:22:02,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5537 transitions. [2019-11-23 21:22:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-23 21:22:02,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:02,326 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:02,326 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:02,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash -682505054, now seen corresponding path program 1 times [2019-11-23 21:22:02,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:02,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969664458] [2019-11-23 21:22:02,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 21:22:02,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969664458] [2019-11-23 21:22:02,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:02,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:02,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540928658] [2019-11-23 21:22:02,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:22:02,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:22:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:22:02,826 INFO L87 Difference]: Start difference. First operand 4144 states and 5537 transitions. Second operand 5 states. [2019-11-23 21:22:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:09,067 INFO L93 Difference]: Finished difference Result 13806 states and 18082 transitions. [2019-11-23 21:22:09,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:09,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-11-23 21:22:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:09,115 INFO L225 Difference]: With dead ends: 13806 [2019-11-23 21:22:09,115 INFO L226 Difference]: Without dead ends: 9664 [2019-11-23 21:22:09,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2019-11-23 21:22:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2019-11-23 21:22:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:22:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10715 transitions. [2019-11-23 21:22:09,280 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10715 transitions. Word has length 228 [2019-11-23 21:22:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:09,281 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 10715 transitions. [2019-11-23 21:22:09,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:22:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10715 transitions. [2019-11-23 21:22:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2019-11-23 21:22:09,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:09,329 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:09,329 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1797159510, now seen corresponding path program 1 times [2019-11-23 21:22:09,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:09,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038669977] [2019-11-23 21:22:09,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 314 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 21:22:09,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038669977] [2019-11-23 21:22:09,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595592208] [2019-11-23 21:22:09,938 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 21:22:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:10,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:10,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:22:10,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:10,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:10,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406565805] [2019-11-23 21:22:10,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:10,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:10,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:10,311 INFO L87 Difference]: Start difference. First operand 8974 states and 10715 transitions. Second operand 3 states. [2019-11-23 21:22:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:14,342 INFO L93 Difference]: Finished difference Result 22086 states and 27009 transitions. [2019-11-23 21:22:14,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:14,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 410 [2019-11-23 21:22:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:14,398 INFO L225 Difference]: With dead ends: 22086 [2019-11-23 21:22:14,399 INFO L226 Difference]: Without dead ends: 13114 [2019-11-23 21:22:14,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 409 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2019-11-23 21:22:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13114. [2019-11-23 21:22:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13114 states. [2019-11-23 21:22:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 15840 transitions. [2019-11-23 21:22:14,626 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 15840 transitions. Word has length 410 [2019-11-23 21:22:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:14,627 INFO L462 AbstractCegarLoop]: Abstraction has 13114 states and 15840 transitions. [2019-11-23 21:22:14,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 15840 transitions. [2019-11-23 21:22:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2019-11-23 21:22:14,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:14,636 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:14,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:14,851 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1359355177, now seen corresponding path program 1 times [2019-11-23 21:22:14,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:14,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044248154] [2019-11-23 21:22:14,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-23 21:22:15,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044248154] [2019-11-23 21:22:15,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586786329] [2019-11-23 21:22:15,591 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 21:22:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:15,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:15,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 21:22:15,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:15,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:22:15,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728301336] [2019-11-23 21:22:15,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:15,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:15,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:15,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:22:15,919 INFO L87 Difference]: Start difference. First operand 13114 states and 15840 transitions. Second operand 3 states. [2019-11-23 21:22:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:19,860 INFO L93 Difference]: Finished difference Result 35886 states and 43747 transitions. [2019-11-23 21:22:19,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:19,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 416 [2019-11-23 21:22:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:19,943 INFO L225 Difference]: With dead ends: 35886 [2019-11-23 21:22:19,944 INFO L226 Difference]: Without dead ends: 22774 [2019-11-23 21:22:19,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:22:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2019-11-23 21:22:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22084. [2019-11-23 21:22:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22084 states. [2019-11-23 21:22:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 26694 transitions. [2019-11-23 21:22:20,380 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 26694 transitions. Word has length 416 [2019-11-23 21:22:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:20,382 INFO L462 AbstractCegarLoop]: Abstraction has 22084 states and 26694 transitions. [2019-11-23 21:22:20,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 26694 transitions. [2019-11-23 21:22:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2019-11-23 21:22:20,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:20,406 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:20,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:20,612 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:20,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2025206064, now seen corresponding path program 1 times [2019-11-23 21:22:20,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:20,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055421332] [2019-11-23 21:22:20,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 461 proven. 3 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-23 21:22:21,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055421332] [2019-11-23 21:22:21,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123279486] [2019-11-23 21:22:21,376 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 21:22:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:21,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:21,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 21:22:21,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:21,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:21,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234397191] [2019-11-23 21:22:21,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:21,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:21,814 INFO L87 Difference]: Start difference. First operand 22084 states and 26694 transitions. Second operand 3 states. [2019-11-23 21:22:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:25,584 INFO L93 Difference]: Finished difference Result 55896 states and 68923 transitions. [2019-11-23 21:22:25,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:25,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2019-11-23 21:22:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:25,629 INFO L225 Difference]: With dead ends: 55896 [2019-11-23 21:22:25,630 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:22:25,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 506 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:22:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 28984. [2019-11-23 21:22:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28984 states. [2019-11-23 21:22:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28984 states to 28984 states and 31320 transitions. [2019-11-23 21:22:26,052 INFO L78 Accepts]: Start accepts. Automaton has 28984 states and 31320 transitions. Word has length 507 [2019-11-23 21:22:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:26,061 INFO L462 AbstractCegarLoop]: Abstraction has 28984 states and 31320 transitions. [2019-11-23 21:22:26,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28984 states and 31320 transitions. [2019-11-23 21:22:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2019-11-23 21:22:26,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:26,090 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:26,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:26,299 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2105159180, now seen corresponding path program 1 times [2019-11-23 21:22:26,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:26,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033528497] [2019-11-23 21:22:26,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 21:22:26,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033528497] [2019-11-23 21:22:26,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:26,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:22:26,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263140048] [2019-11-23 21:22:26,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:26,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:22:26,976 INFO L87 Difference]: Start difference. First operand 28984 states and 31320 transitions. Second operand 3 states. [2019-11-23 21:22:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:29,454 INFO L93 Difference]: Finished difference Result 57966 states and 62638 transitions. [2019-11-23 21:22:29,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:29,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 590 [2019-11-23 21:22:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:29,489 INFO L225 Difference]: With dead ends: 57966 [2019-11-23 21:22:29,489 INFO L226 Difference]: Without dead ends: 28984 [2019-11-23 21:22:29,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:22:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28984 states. [2019-11-23 21:22:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28984 to 28984. [2019-11-23 21:22:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28984 states. [2019-11-23 21:22:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28984 states to 28984 states and 30992 transitions. [2019-11-23 21:22:29,849 INFO L78 Accepts]: Start accepts. Automaton has 28984 states and 30992 transitions. Word has length 590 [2019-11-23 21:22:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:29,850 INFO L462 AbstractCegarLoop]: Abstraction has 28984 states and 30992 transitions. [2019-11-23 21:22:29,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 28984 states and 30992 transitions. [2019-11-23 21:22:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2019-11-23 21:22:29,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:29,890 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:29,891 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 773307186, now seen corresponding path program 1 times [2019-11-23 21:22:29,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:29,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570778134] [2019-11-23 21:22:29,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 564 proven. 198 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-11-23 21:22:32,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570778134] [2019-11-23 21:22:32,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649935610] [2019-11-23 21:22:32,188 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 21:22:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:32,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:32,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2019-11-23 21:22:32,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:32,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2019-11-23 21:22:32,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857578386] [2019-11-23 21:22:32,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:32,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:22:32,826 INFO L87 Difference]: Start difference. First operand 28984 states and 30992 transitions. Second operand 3 states. [2019-11-23 21:22:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:35,347 INFO L93 Difference]: Finished difference Result 65556 states and 70223 transitions. [2019-11-23 21:22:35,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:35,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 729 [2019-11-23 21:22:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:35,386 INFO L225 Difference]: With dead ends: 65556 [2019-11-23 21:22:35,387 INFO L226 Difference]: Without dead ends: 36574 [2019-11-23 21:22:35,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 728 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:22:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36574 states. [2019-11-23 21:22:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36574 to 36574. [2019-11-23 21:22:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36574 states. [2019-11-23 21:22:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36574 states to 36574 states and 38886 transitions. [2019-11-23 21:22:35,791 INFO L78 Accepts]: Start accepts. Automaton has 36574 states and 38886 transitions. Word has length 729 [2019-11-23 21:22:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:35,792 INFO L462 AbstractCegarLoop]: Abstraction has 36574 states and 38886 transitions. [2019-11-23 21:22:35,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 36574 states and 38886 transitions. [2019-11-23 21:22:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2019-11-23 21:22:35,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:35,813 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:36,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:36,025 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293001, now seen corresponding path program 1 times [2019-11-23 21:22:36,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:36,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269546263] [2019-11-23 21:22:36,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2019-11-23 21:22:36,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269546263] [2019-11-23 21:22:36,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:36,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:36,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661330963] [2019-11-23 21:22:36,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:36,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:36,874 INFO L87 Difference]: Start difference. First operand 36574 states and 38886 transitions. Second operand 4 states. [2019-11-23 21:22:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:41,384 INFO L93 Difference]: Finished difference Result 94536 states and 100568 transitions. [2019-11-23 21:22:41,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:41,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 764 [2019-11-23 21:22:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:41,430 INFO L225 Difference]: With dead ends: 94536 [2019-11-23 21:22:41,430 INFO L226 Difference]: Without dead ends: 57964 [2019-11-23 21:22:41,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:22:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57964 states. [2019-11-23 21:22:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57964 to 53824. [2019-11-23 21:22:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53824 states. [2019-11-23 21:22:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53824 states to 53824 states and 56984 transitions. [2019-11-23 21:22:41,891 INFO L78 Accepts]: Start accepts. Automaton has 53824 states and 56984 transitions. Word has length 764 [2019-11-23 21:22:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:41,891 INFO L462 AbstractCegarLoop]: Abstraction has 53824 states and 56984 transitions. [2019-11-23 21:22:41,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 53824 states and 56984 transitions. [2019-11-23 21:22:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1315 [2019-11-23 21:22:41,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:41,921 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, 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:41,921 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash 621901765, now seen corresponding path program 1 times [2019-11-23 21:22:41,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:41,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572360503] [2019-11-23 21:22:41,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2249 backedges. 717 proven. 0 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2019-11-23 21:22:43,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572360503] [2019-11-23 21:22:43,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:43,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:43,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045599086] [2019-11-23 21:22:43,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:43,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:43,414 INFO L87 Difference]: Start difference. First operand 53824 states and 56984 transitions. Second operand 4 states. [2019-11-23 21:22:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:47,828 INFO L93 Difference]: Finished difference Result 116616 states and 124012 transitions. [2019-11-23 21:22:47,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:47,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1314 [2019-11-23 21:22:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:47,882 INFO L225 Difference]: With dead ends: 116616 [2019-11-23 21:22:47,882 INFO L226 Difference]: Without dead ends: 63484 [2019-11-23 21:22:47,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 3 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 21:22:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63484 states. [2019-11-23 21:22:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63484 to 55894. [2019-11-23 21:22:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55894 states. [2019-11-23 21:22:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55894 states to 55894 states and 58958 transitions. [2019-11-23 21:22:48,408 INFO L78 Accepts]: Start accepts. Automaton has 55894 states and 58958 transitions. Word has length 1314 [2019-11-23 21:22:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:48,409 INFO L462 AbstractCegarLoop]: Abstraction has 55894 states and 58958 transitions. [2019-11-23 21:22:48,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 55894 states and 58958 transitions. [2019-11-23 21:22:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1346 [2019-11-23 21:22:48,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:48,431 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:48,431 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1710556218, now seen corresponding path program 1 times [2019-11-23 21:22:48,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:48,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949845718] [2019-11-23 21:22:48,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 2079 trivial. 0 not checked. [2019-11-23 21:22:50,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949845718] [2019-11-23 21:22:50,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:50,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:50,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762516142] [2019-11-23 21:22:50,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:50,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:50,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:50,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:50,969 INFO L87 Difference]: Start difference. First operand 55894 states and 58958 transitions. Second operand 4 states. [2019-11-23 21:22:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:55,576 INFO L93 Difference]: Finished difference Result 126966 states and 133924 transitions. [2019-11-23 21:22:55,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:55,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1345 [2019-11-23 21:22:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:55,635 INFO L225 Difference]: With dead ends: 126966 [2019-11-23 21:22:55,636 INFO L226 Difference]: Without dead ends: 69694 [2019-11-23 21:22:55,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:22:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69694 states. [2019-11-23 21:22:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69694 to 69004. [2019-11-23 21:22:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69004 states. [2019-11-23 21:22:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69004 states to 69004 states and 72236 transitions. [2019-11-23 21:22:56,175 INFO L78 Accepts]: Start accepts. Automaton has 69004 states and 72236 transitions. Word has length 1345 [2019-11-23 21:22:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:56,177 INFO L462 AbstractCegarLoop]: Abstraction has 69004 states and 72236 transitions. [2019-11-23 21:22:56,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 69004 states and 72236 transitions. [2019-11-23 21:22:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1560 [2019-11-23 21:22:56,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:56,222 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:56,222 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash 208703131, now seen corresponding path program 1 times [2019-11-23 21:22:56,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:56,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686807886] [2019-11-23 21:22:56,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3096 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 2796 trivial. 0 not checked. [2019-11-23 21:22:58,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686807886] [2019-11-23 21:22:58,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:58,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:22:58,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314725213] [2019-11-23 21:22:58,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:58,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:22:58,702 INFO L87 Difference]: Start difference. First operand 69004 states and 72236 transitions. Second operand 3 states.