/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:12:41,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:12:41,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:12:41,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:12:41,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:12:41,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:12:41,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:12:41,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:12:41,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:12:41,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:12:41,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:12:41,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:12:41,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:12:41,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:12:41,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:12:41,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:12:41,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:12:41,301 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 [2019-11-06 19:12:41,328 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:12:41,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:12:41,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:12:41,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:12:41,332 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:12:41,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:12:41,333 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:12:41,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:12:41,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:12:41,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:12:41,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:12:41,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:12:41,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:12:41,336 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:12:41,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:12:41,336 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:12:41,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:12:41,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:12:41,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:12:41,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:12:41,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:12:41,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:12:41,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:12:41,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:12:41,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:12:41,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:12:41,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:12:41,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:12:41,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:12:41,658 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:12:41,670 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:12:41,673 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:12:41,674 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:12:41,675 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:12:41,677 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-11-06 19:12:41,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fd9e9567/07be7445f5334968b93ce7141ad6eb87/FLAG6c1cca244 [2019-11-06 19:12:42,338 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:12:42,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-11-06 19:12:42,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fd9e9567/07be7445f5334968b93ce7141ad6eb87/FLAG6c1cca244 [2019-11-06 19:12:42,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fd9e9567/07be7445f5334968b93ce7141ad6eb87 [2019-11-06 19:12:42,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:12:42,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:12:42,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:42,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:12:42,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:12:42,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:42" (1/1) ... [2019-11-06 19:12:42,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7654438a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:42, skipping insertion in model container [2019-11-06 19:12:42,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:42" (1/1) ... [2019-11-06 19:12:42,657 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:12:42,724 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:12:43,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:43,300 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:12:43,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:43,486 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:12:43,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43 WrapperNode [2019-11-06 19:12:43,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:43,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:12:43,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:12:43,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:12:43,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (1/1) ... [2019-11-06 19:12:43,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (1/1) ... [2019-11-06 19:12:43,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (1/1) ... [2019-11-06 19:12:43,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (1/1) ... [2019-11-06 19:12:43,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (1/1) ... [2019-11-06 19:12:43,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (1/1) ... [2019-11-06 19:12:43,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (1/1) ... [2019-11-06 19:12:43,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:12:43,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:12:43,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:12:43,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:12:43,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (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 [2019-11-06 19:12:43,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:12:43,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:12:43,695 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:12:43,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:12:43,696 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:12:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:12:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:12:43,698 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:12:43,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:12:43,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:12:43,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:12:45,150 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:12:45,150 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:12:45,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:45 BoogieIcfgContainer [2019-11-06 19:12:45,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:12:45,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:12:45,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:12:45,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:12:45,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:12:42" (1/3) ... [2019-11-06 19:12:45,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408dd9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:45, skipping insertion in model container [2019-11-06 19:12:45,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:43" (2/3) ... [2019-11-06 19:12:45,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408dd9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:45, skipping insertion in model container [2019-11-06 19:12:45,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:45" (3/3) ... [2019-11-06 19:12:45,160 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label15.c [2019-11-06 19:12:45,169 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:12:45,178 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:12:45,189 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:12:45,218 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:12:45,218 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:12:45,218 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:12:45,218 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:12:45,218 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:12:45,219 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:12:45,219 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:12:45,219 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:12:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:12:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 19:12:45,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:45,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:45,258 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash -598870286, now seen corresponding path program 1 times [2019-11-06 19:12:45,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:45,274 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111731212] [2019-11-06 19:12:45,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:45,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111731212] [2019-11-06 19:12:45,683 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:45,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:12:45,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703527645] [2019-11-06 19:12:45,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:45,692 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:45,709 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:12:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:47,963 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:12:47,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:12:47,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-11-06 19:12:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:47,988 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:12:47,988 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:12:47,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:12:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:12:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:12:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:12:48,105 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 71 [2019-11-06 19:12:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:48,106 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:12:48,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:12:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 19:12:48,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:48,114 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, 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] [2019-11-06 19:12:48,115 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:48,115 INFO L82 PathProgramCache]: Analyzing trace with hash 96309737, now seen corresponding path program 1 times [2019-11-06 19:12:48,115 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:48,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650331825] [2019-11-06 19:12:48,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:48,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650331825] [2019-11-06 19:12:48,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:48,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:12:48,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145875102] [2019-11-06 19:12:48,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:12:48,471 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:12:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:12:48,472 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:12:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:51,123 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-11-06 19:12:51,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:51,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2019-11-06 19:12:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:51,137 INFO L225 Difference]: With dead ends: 2246 [2019-11-06 19:12:51,138 INFO L226 Difference]: Without dead ends: 1694 [2019-11-06 19:12:51,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:12:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-11-06 19:12:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1128. [2019-11-06 19:12:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-11-06 19:12:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1732 transitions. [2019-11-06 19:12:51,237 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1732 transitions. Word has length 140 [2019-11-06 19:12:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:51,240 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1732 transitions. [2019-11-06 19:12:51,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:12:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1732 transitions. [2019-11-06 19:12:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 19:12:51,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:51,255 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, 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] [2019-11-06 19:12:51,257 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1593048690, now seen corresponding path program 1 times [2019-11-06 19:12:51,259 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:51,259 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630894935] [2019-11-06 19:12:51,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:51,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630894935] [2019-11-06 19:12:51,598 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:51,598 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:51,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139872980] [2019-11-06 19:12:51,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:51,602 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:51,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:51,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:51,602 INFO L87 Difference]: Start difference. First operand 1128 states and 1732 transitions. Second operand 8 states. [2019-11-06 19:12:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:53,514 INFO L93 Difference]: Finished difference Result 2856 states and 4565 transitions. [2019-11-06 19:12:53,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:12:53,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2019-11-06 19:12:53,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:53,526 INFO L225 Difference]: With dead ends: 2856 [2019-11-06 19:12:53,527 INFO L226 Difference]: Without dead ends: 1734 [2019-11-06 19:12:53,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:12:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2019-11-06 19:12:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1706. [2019-11-06 19:12:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2019-11-06 19:12:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2406 transitions. [2019-11-06 19:12:53,591 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2406 transitions. Word has length 141 [2019-11-06 19:12:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:53,592 INFO L462 AbstractCegarLoop]: Abstraction has 1706 states and 2406 transitions. [2019-11-06 19:12:53,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:12:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2406 transitions. [2019-11-06 19:12:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 19:12:53,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:53,594 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, 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] [2019-11-06 19:12:53,595 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash -552951950, now seen corresponding path program 1 times [2019-11-06 19:12:53,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:53,596 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528500927] [2019-11-06 19:12:53,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:53,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528500927] [2019-11-06 19:12:53,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:53,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:53,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906148208] [2019-11-06 19:12:53,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:53,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:53,873 INFO L87 Difference]: Start difference. First operand 1706 states and 2406 transitions. Second operand 8 states. [2019-11-06 19:12:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:55,757 INFO L93 Difference]: Finished difference Result 4296 states and 6639 transitions. [2019-11-06 19:12:55,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:12:55,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 143 [2019-11-06 19:12:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:55,776 INFO L225 Difference]: With dead ends: 4296 [2019-11-06 19:12:55,777 INFO L226 Difference]: Without dead ends: 2596 [2019-11-06 19:12:55,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2019-11-06 19:12:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2094. [2019-11-06 19:12:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2019-11-06 19:12:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2889 transitions. [2019-11-06 19:12:55,882 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2889 transitions. Word has length 143 [2019-11-06 19:12:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:55,883 INFO L462 AbstractCegarLoop]: Abstraction has 2094 states and 2889 transitions. [2019-11-06 19:12:55,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:12:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2889 transitions. [2019-11-06 19:12:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-06 19:12:55,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:55,888 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:55,888 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:55,889 INFO L82 PathProgramCache]: Analyzing trace with hash -621255906, now seen corresponding path program 1 times [2019-11-06 19:12:55,889 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:55,889 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032774795] [2019-11-06 19:12:55,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:12:56,087 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032774795] [2019-11-06 19:12:56,087 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160521813] [2019-11-06 19:12:56,087 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 [2019-11-06 19:12:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:56,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:12:56,366 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:56,366 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:56,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758799069] [2019-11-06 19:12:56,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:56,368 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:56,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:56,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:56,368 INFO L87 Difference]: Start difference. First operand 2094 states and 2889 transitions. Second operand 3 states. [2019-11-06 19:12:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:57,255 INFO L93 Difference]: Finished difference Result 4918 states and 6767 transitions. [2019-11-06 19:12:57,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:57,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 227 [2019-11-06 19:12:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:57,270 INFO L225 Difference]: With dead ends: 4918 [2019-11-06 19:12:57,271 INFO L226 Difference]: Without dead ends: 2830 [2019-11-06 19:12:57,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2019-11-06 19:12:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2644. [2019-11-06 19:12:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2644 states. [2019-11-06 19:12:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3578 transitions. [2019-11-06 19:12:57,371 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3578 transitions. Word has length 227 [2019-11-06 19:12:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:57,373 INFO L462 AbstractCegarLoop]: Abstraction has 2644 states and 3578 transitions. [2019-11-06 19:12:57,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3578 transitions. [2019-11-06 19:12:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-11-06 19:12:57,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:57,381 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, 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] [2019-11-06 19:12:57,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:57,595 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1502863669, now seen corresponding path program 1 times [2019-11-06 19:12:57,596 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:57,596 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844508439] [2019-11-06 19:12:57,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:58,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844508439] [2019-11-06 19:12:58,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507389079] [2019-11-06 19:12:58,268 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 [2019-11-06 19:12:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:58,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 19:12:58,565 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:58,566 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-11-06 19:12:58,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248209149] [2019-11-06 19:12:58,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:58,573 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:58,574 INFO L87 Difference]: Start difference. First operand 2644 states and 3578 transitions. Second operand 3 states. [2019-11-06 19:12:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:59,445 INFO L93 Difference]: Finished difference Result 5100 states and 6954 transitions. [2019-11-06 19:12:59,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:59,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 282 [2019-11-06 19:12:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:59,472 INFO L225 Difference]: With dead ends: 5100 [2019-11-06 19:12:59,472 INFO L226 Difference]: Without dead ends: 2644 [2019-11-06 19:12:59,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:12:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2019-11-06 19:12:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2278. [2019-11-06 19:12:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-11-06 19:12:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3024 transitions. [2019-11-06 19:12:59,538 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3024 transitions. Word has length 282 [2019-11-06 19:12:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:59,539 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 3024 transitions. [2019-11-06 19:12:59,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3024 transitions. [2019-11-06 19:12:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-11-06 19:12:59,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:59,550 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:12:59,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:59,754 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1660138625, now seen corresponding path program 1 times [2019-11-06 19:12:59,755 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:59,756 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058803572] [2019-11-06 19:12:59,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 237 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:13:00,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058803572] [2019-11-06 19:13:00,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591996785] [2019-11-06 19:13:00,313 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 [2019-11-06 19:13:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:00,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:13:00,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:00,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:13:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-06 19:13:00,697 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:00,697 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-11-06 19:13:00,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21550764] [2019-11-06 19:13:00,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:00,700 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:00,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:00,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:13:00,701 INFO L87 Difference]: Start difference. First operand 2278 states and 3024 transitions. Second operand 5 states. [2019-11-06 19:13:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:01,992 INFO L93 Difference]: Finished difference Result 4396 states and 5902 transitions. [2019-11-06 19:13:01,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:13:01,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2019-11-06 19:13:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:02,006 INFO L225 Difference]: With dead ends: 4396 [2019-11-06 19:13:02,007 INFO L226 Difference]: Without dead ends: 2308 [2019-11-06 19:13:02,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2019-11-06 19:13:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2288. [2019-11-06 19:13:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2019-11-06 19:13:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 2998 transitions. [2019-11-06 19:13:02,083 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 2998 transitions. Word has length 336 [2019-11-06 19:13:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:02,083 INFO L462 AbstractCegarLoop]: Abstraction has 2288 states and 2998 transitions. [2019-11-06 19:13:02,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 2998 transitions. [2019-11-06 19:13:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-11-06 19:13:02,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:02,095 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, 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, 2, 2, 2, 2, 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] [2019-11-06 19:13:02,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:02,299 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:02,300 INFO L82 PathProgramCache]: Analyzing trace with hash -178670679, now seen corresponding path program 1 times [2019-11-06 19:13:02,300 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:02,300 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173077339] [2019-11-06 19:13:02,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 202 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:13:03,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173077339] [2019-11-06 19:13:03,627 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973863962] [2019-11-06 19:13:03,627 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 [2019-11-06 19:13:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:03,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:13:03,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:03,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 354 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-06 19:13:04,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:04,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:13:04,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458518225] [2019-11-06 19:13:04,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:13:04,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:13:04,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:13:04,098 INFO L87 Difference]: Start difference. First operand 2288 states and 2998 transitions. Second operand 16 states. [2019-11-06 19:13:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:07,867 INFO L93 Difference]: Finished difference Result 4512 states and 5985 transitions. [2019-11-06 19:13:07,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:13:07,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 420 [2019-11-06 19:13:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:07,878 INFO L225 Difference]: With dead ends: 4512 [2019-11-06 19:13:07,878 INFO L226 Difference]: Without dead ends: 2363 [2019-11-06 19:13:07,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:13:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2019-11-06 19:13:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2278. [2019-11-06 19:13:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-11-06 19:13:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2741 transitions. [2019-11-06 19:13:07,947 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2741 transitions. Word has length 420 [2019-11-06 19:13:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:07,947 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 2741 transitions. [2019-11-06 19:13:07,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:13:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2741 transitions. [2019-11-06 19:13:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2019-11-06 19:13:07,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:07,968 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, 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, 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] [2019-11-06 19:13:08,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:08,173 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1287394298, now seen corresponding path program 1 times [2019-11-06 19:13:08,174 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:08,174 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543784449] [2019-11-06 19:13:08,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 482 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:13:09,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543784449] [2019-11-06 19:13:09,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081694944] [2019-11-06 19:13:09,217 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 [2019-11-06 19:13:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:09,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:13:09,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 742 proven. 2 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-06 19:13:09,634 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:09,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:13:09,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638229027] [2019-11-06 19:13:09,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:09,636 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:09,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:09,637 INFO L87 Difference]: Start difference. First operand 2278 states and 2741 transitions. Second operand 9 states. [2019-11-06 19:13:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:11,748 INFO L93 Difference]: Finished difference Result 4926 states and 6003 transitions. [2019-11-06 19:13:11,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:13:11,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 555 [2019-11-06 19:13:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:11,760 INFO L225 Difference]: With dead ends: 4926 [2019-11-06 19:13:11,760 INFO L226 Difference]: Without dead ends: 2838 [2019-11-06 19:13:11,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 568 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2019-11-06 19:13:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2652. [2019-11-06 19:13:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2019-11-06 19:13:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3110 transitions. [2019-11-06 19:13:11,849 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3110 transitions. Word has length 555 [2019-11-06 19:13:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:11,850 INFO L462 AbstractCegarLoop]: Abstraction has 2652 states and 3110 transitions. [2019-11-06 19:13:11,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3110 transitions. [2019-11-06 19:13:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2019-11-06 19:13:11,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:11,873 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, 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, 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, 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] [2019-11-06 19:13:12,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:12,085 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash -687518034, now seen corresponding path program 1 times [2019-11-06 19:13:12,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:12,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177585020] [2019-11-06 19:13:12,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 638 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:13:13,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177585020] [2019-11-06 19:13:13,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752441056] [2019-11-06 19:13:13,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:13,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:13:13,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:13,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 977 proven. 2 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2019-11-06 19:13:14,699 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:14,699 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:13:14,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532385762] [2019-11-06 19:13:14,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:13:14,704 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:14,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:13:14,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:13:14,704 INFO L87 Difference]: Start difference. First operand 2652 states and 3110 transitions. Second operand 12 states. [2019-11-06 19:13:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:16,780 INFO L93 Difference]: Finished difference Result 5410 states and 6378 transitions. [2019-11-06 19:13:16,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:13:16,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 639 [2019-11-06 19:13:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:16,793 INFO L225 Difference]: With dead ends: 5410 [2019-11-06 19:13:16,793 INFO L226 Difference]: Without dead ends: 2907 [2019-11-06 19:13:16,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 658 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:13:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2019-11-06 19:13:16,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2654. [2019-11-06 19:13:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-11-06 19:13:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3022 transitions. [2019-11-06 19:13:16,861 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3022 transitions. Word has length 639 [2019-11-06 19:13:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:16,862 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3022 transitions. [2019-11-06 19:13:16,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:13:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3022 transitions. [2019-11-06 19:13:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2019-11-06 19:13:16,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:16,873 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, 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, 4, 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] [2019-11-06 19:13:17,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:17,085 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1841491034, now seen corresponding path program 2 times [2019-11-06 19:13:17,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:17,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60226903] [2019-11-06 19:13:17,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY