/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/Problem15_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:15:48,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:15:48,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:15:48,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:15:48,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:15:48,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:15:48,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:15:48,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:15:48,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:15:48,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:15:48,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:15:48,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:15:48,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:15:48,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:15:48,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:15:48,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:15:48,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:15:48,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:15:48,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:15:48,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:15:48,445 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 19:15:48,467 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:15:48,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:15:48,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:15:48,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:15:48,471 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:15:48,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:15:48,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:15:48,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:15:48,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:15:48,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:15:48,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:15:48,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:15:48,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:15:48,474 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:15:48,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:15:48,474 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:15:48,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:15:48,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:15:48,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:15:48,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:15:48,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:15:48,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:48,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:15:48,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:15:48,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:15:48,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:15:48,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:15:48,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:15:48,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:15:48,754 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:15:48,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:15:48,771 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:15:48,772 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:15:48,773 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:15:48,774 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-11-06 19:15:48,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdac8d21a/c2a8762df364412cb561f2d1a284919b/FLAGcaa254f96 [2019-11-06 19:15:49,526 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:49,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-11-06 19:15:49,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdac8d21a/c2a8762df364412cb561f2d1a284919b/FLAGcaa254f96 [2019-11-06 19:15:49,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdac8d21a/c2a8762df364412cb561f2d1a284919b [2019-11-06 19:15:49,769 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:49,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:49,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:49,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:49,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:49,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:49" (1/1) ... [2019-11-06 19:15:49,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589e588e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:49, skipping insertion in model container [2019-11-06 19:15:49,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:49" (1/1) ... [2019-11-06 19:15:49,787 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:49,859 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:50,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:50,700 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:51,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:51,144 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:51,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51 WrapperNode [2019-11-06 19:15:51,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:51,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:51,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:51,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:51,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (1/1) ... [2019-11-06 19:15:51,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (1/1) ... [2019-11-06 19:15:51,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (1/1) ... [2019-11-06 19:15:51,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (1/1) ... [2019-11-06 19:15:51,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (1/1) ... [2019-11-06 19:15:51,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (1/1) ... [2019-11-06 19:15:51,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (1/1) ... [2019-11-06 19:15:51,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:51,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:51,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:51,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:51,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (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 19:15:51,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:15:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:15:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:51,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:51,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:51,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:54,818 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:54,819 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:54,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:54 BoogieIcfgContainer [2019-11-06 19:15:54,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:54,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:54,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:54,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:54,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:49" (1/3) ... [2019-11-06 19:15:54,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7323a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:54, skipping insertion in model container [2019-11-06 19:15:54,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:51" (2/3) ... [2019-11-06 19:15:54,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7323a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:54, skipping insertion in model container [2019-11-06 19:15:54,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:54" (3/3) ... [2019-11-06 19:15:54,829 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label34.c [2019-11-06 19:15:54,839 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:54,848 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:54,860 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:54,890 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:54,890 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:54,890 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:54,890 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:54,891 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:54,891 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:54,891 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:54,891 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:15:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 19:15:54,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:54,927 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:54,928 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1117771851, now seen corresponding path program 1 times [2019-11-06 19:15:54,941 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:54,942 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298745388] [2019-11-06 19:15:54,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:55,231 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 19:15:55,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298745388] [2019-11-06 19:15:55,233 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:55,233 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:55,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569538569] [2019-11-06 19:15:55,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:55,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:55,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:55,258 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:16:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:03,007 INFO L93 Difference]: Finished difference Result 1576 states and 2877 transitions. [2019-11-06 19:16:03,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:03,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-06 19:16:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:03,048 INFO L225 Difference]: With dead ends: 1576 [2019-11-06 19:16:03,048 INFO L226 Difference]: Without dead ends: 1056 [2019-11-06 19:16:03,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-11-06 19:16:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1029. [2019-11-06 19:16:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2019-11-06 19:16:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1656 transitions. [2019-11-06 19:16:03,211 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1656 transitions. Word has length 19 [2019-11-06 19:16:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:03,211 INFO L462 AbstractCegarLoop]: Abstraction has 1029 states and 1656 transitions. [2019-11-06 19:16:03,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1656 transitions. [2019-11-06 19:16:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 19:16:03,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:03,217 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:16:03,217 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2035291641, now seen corresponding path program 1 times [2019-11-06 19:16:03,218 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:03,218 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067153759] [2019-11-06 19:16:03,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:03,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067153759] [2019-11-06 19:16:03,608 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:03,608 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:16:03,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700276751] [2019-11-06 19:16:03,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:16:03,616 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:03,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:16:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:16:03,617 INFO L87 Difference]: Start difference. First operand 1029 states and 1656 transitions. Second operand 8 states. [2019-11-06 19:16:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:10,204 INFO L93 Difference]: Finished difference Result 3054 states and 5010 transitions. [2019-11-06 19:16:10,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:16:10,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2019-11-06 19:16:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:10,218 INFO L225 Difference]: With dead ends: 3054 [2019-11-06 19:16:10,218 INFO L226 Difference]: Without dead ends: 2031 [2019-11-06 19:16:10,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2019-11-06 19:16:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1984. [2019-11-06 19:16:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1984 states. [2019-11-06 19:16:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2774 transitions. [2019-11-06 19:16:10,313 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2774 transitions. Word has length 91 [2019-11-06 19:16:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:10,314 INFO L462 AbstractCegarLoop]: Abstraction has 1984 states and 2774 transitions. [2019-11-06 19:16:10,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:10,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2774 transitions. [2019-11-06 19:16:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 19:16:10,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:10,328 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:16:10,328 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1222387191, now seen corresponding path program 1 times [2019-11-06 19:16:10,329 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:10,329 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411523319] [2019-11-06 19:16:10,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:10,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411523319] [2019-11-06 19:16:10,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426462485] [2019-11-06 19:16:10,672 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 19:16:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:10,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 19:16:10,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:10,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:16:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:10,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:10,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:16:10,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405035644] [2019-11-06 19:16:10,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:10,897 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:10,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:10,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:16:10,898 INFO L87 Difference]: Start difference. First operand 1984 states and 2774 transitions. Second operand 5 states. [2019-11-06 19:16:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:14,910 INFO L93 Difference]: Finished difference Result 4315 states and 5964 transitions. [2019-11-06 19:16:14,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:14,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-11-06 19:16:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:14,924 INFO L225 Difference]: With dead ends: 4315 [2019-11-06 19:16:14,924 INFO L226 Difference]: Without dead ends: 2337 [2019-11-06 19:16:14,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:16:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2019-11-06 19:16:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2304. [2019-11-06 19:16:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2019-11-06 19:16:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3106 transitions. [2019-11-06 19:16:14,993 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3106 transitions. Word has length 99 [2019-11-06 19:16:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:14,993 INFO L462 AbstractCegarLoop]: Abstraction has 2304 states and 3106 transitions. [2019-11-06 19:16:14,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3106 transitions. [2019-11-06 19:16:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-06 19:16:14,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:14,997 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 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 19:16:15,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:15,201 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2037705640, now seen corresponding path program 1 times [2019-11-06 19:16:15,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:15,202 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573578557] [2019-11-06 19:16:15,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:16:15,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573578557] [2019-11-06 19:16:15,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14423899] [2019-11-06 19:16:15,962 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 19:16:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:16,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 19:16:16,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:16,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:16:16,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:16:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:16,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:16,338 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-11-06 19:16:16,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101536176] [2019-11-06 19:16:16,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 19:16:16,342 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 19:16:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2019-11-06 19:16:16,343 INFO L87 Difference]: Start difference. First operand 2304 states and 3106 transitions. Second operand 22 states. [2019-11-06 19:16:28,501 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40