/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/Problem16_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:56,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:56,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:56,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:16:56,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:56,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:56,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:56,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:56,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:56,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:56,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:56,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:56,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:56,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:56,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:56,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:56,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:16:56,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:56,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:56,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:56,800 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 19:16:56,836 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:56,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:56,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:56,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:56,841 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:56,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:56,841 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:56,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:56,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:56,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:56,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:56,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:56,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:56,845 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:56,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:56,845 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:56,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:56,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:56,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:56,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:56,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:56,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:56,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:56,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:56,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:56,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:56,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:56,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:56,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:16:57,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:16:57,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:16:57,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:16:57,194 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:16:57,195 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:16:57,195 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-11-06 19:16:57,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38854f386/afb25cca75bd428e85b1b99c125f5255/FLAGc8c62191e [2019-11-06 19:16:57,931 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:16:57,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-11-06 19:16:57,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38854f386/afb25cca75bd428e85b1b99c125f5255/FLAGc8c62191e [2019-11-06 19:16:58,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38854f386/afb25cca75bd428e85b1b99c125f5255 [2019-11-06 19:16:58,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:16:58,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:16:58,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:58,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:16:58,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:16:58,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:58" (1/1) ... [2019-11-06 19:16:58,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4af8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:58, skipping insertion in model container [2019-11-06 19:16:58,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:58" (1/1) ... [2019-11-06 19:16:58,185 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:16:58,257 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:16:59,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:59,187 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:16:59,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:59,778 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:16:59,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59 WrapperNode [2019-11-06 19:16:59,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:59,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:16:59,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:16:59,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:16:59,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (1/1) ... [2019-11-06 19:16:59,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (1/1) ... [2019-11-06 19:16:59,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (1/1) ... [2019-11-06 19:16:59,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (1/1) ... [2019-11-06 19:16:59,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (1/1) ... [2019-11-06 19:16:59,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (1/1) ... [2019-11-06 19:16:59,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (1/1) ... [2019-11-06 19:16:59,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:16:59,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:16:59,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:16:59,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:16:59,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (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 19:17:00,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:02,392 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:02,396 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:02,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:02 BoogieIcfgContainer [2019-11-06 19:17:02,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:02,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:02,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:02,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:02,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:16:58" (1/3) ... [2019-11-06 19:17:02,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b5db42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:02, skipping insertion in model container [2019-11-06 19:17:02,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:59" (2/3) ... [2019-11-06 19:17:02,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b5db42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:02, skipping insertion in model container [2019-11-06 19:17:02,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:02" (3/3) ... [2019-11-06 19:17:02,416 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label02.c [2019-11-06 19:17:02,426 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:02,435 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:02,447 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:02,494 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:02,494 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:02,494 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:02,494 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:02,495 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:02,495 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:02,495 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:02,495 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 19:17:02,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:02,550 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] [2019-11-06 19:17:02,552 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash -64019710, now seen corresponding path program 1 times [2019-11-06 19:17:02,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:02,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292155412] [2019-11-06 19:17:02,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:03,042 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 19:17:03,043 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292155412] [2019-11-06 19:17:03,044 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:03,045 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:03,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603208859] [2019-11-06 19:17:03,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:03,054 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:03,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:03,071 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:08,267 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:17:08,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:08,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-11-06 19:17:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:08,299 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:17:08,299 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:08,311 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 19:17:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1751 transitions. [2019-11-06 19:17:08,444 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1751 transitions. Word has length 67 [2019-11-06 19:17:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:08,447 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1751 transitions. [2019-11-06 19:17:08,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1751 transitions. [2019-11-06 19:17:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 19:17:08,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:08,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:08,465 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:08,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2118195102, now seen corresponding path program 1 times [2019-11-06 19:17:08,466 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:08,466 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375801719] [2019-11-06 19:17:08,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:08,799 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375801719] [2019-11-06 19:17:08,799 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:08,799 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:08,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820971661] [2019-11-06 19:17:08,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:08,805 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:08,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:08,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:08,806 INFO L87 Difference]: Start difference. First operand 1031 states and 1751 transitions. Second operand 9 states. [2019-11-06 19:17:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:13,132 INFO L93 Difference]: Finished difference Result 3130 states and 5428 transitions. [2019-11-06 19:17:13,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:13,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-11-06 19:17:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:13,153 INFO L225 Difference]: With dead ends: 3130 [2019-11-06 19:17:13,154 INFO L226 Difference]: Without dead ends: 2105 [2019-11-06 19:17:13,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:17:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2019-11-06 19:17:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2073. [2019-11-06 19:17:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-11-06 19:17:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3396 transitions. [2019-11-06 19:17:13,248 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3396 transitions. Word has length 137 [2019-11-06 19:17:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:13,249 INFO L462 AbstractCegarLoop]: Abstraction has 2073 states and 3396 transitions. [2019-11-06 19:17:13,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3396 transitions. [2019-11-06 19:17:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 19:17:13,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:13,253 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:13,253 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash -287717798, now seen corresponding path program 1 times [2019-11-06 19:17:13,254 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:13,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138360204] [2019-11-06 19:17:13,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:13,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138360204] [2019-11-06 19:17:13,630 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:13,630 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:13,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913412489] [2019-11-06 19:17:13,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:13,631 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:13,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:13,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:13,632 INFO L87 Difference]: Start difference. First operand 2073 states and 3396 transitions. Second operand 9 states. [2019-11-06 19:17:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:18,950 INFO L93 Difference]: Finished difference Result 7992 states and 13707 transitions. [2019-11-06 19:17:18,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:17:18,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 165 [2019-11-06 19:17:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:18,991 INFO L225 Difference]: With dead ends: 7992 [2019-11-06 19:17:18,991 INFO L226 Difference]: Without dead ends: 5925 [2019-11-06 19:17:18,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:17:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2019-11-06 19:17:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5898. [2019-11-06 19:17:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5898 states. [2019-11-06 19:17:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5898 states to 5898 states and 8925 transitions. [2019-11-06 19:17:19,170 INFO L78 Accepts]: Start accepts. Automaton has 5898 states and 8925 transitions. Word has length 165 [2019-11-06 19:17:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:19,171 INFO L462 AbstractCegarLoop]: Abstraction has 5898 states and 8925 transitions. [2019-11-06 19:17:19,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5898 states and 8925 transitions. [2019-11-06 19:17:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-06 19:17:19,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:19,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:19,175 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1076433194, now seen corresponding path program 1 times [2019-11-06 19:17:19,176 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:19,176 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716427505] [2019-11-06 19:17:19,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:19,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716427505] [2019-11-06 19:17:19,526 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:19,526 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:19,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269761060] [2019-11-06 19:17:19,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:19,528 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:19,529 INFO L87 Difference]: Start difference. First operand 5898 states and 8925 transitions. Second operand 9 states. [2019-11-06 19:17:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:23,000 INFO L93 Difference]: Finished difference Result 14973 states and 23288 transitions. [2019-11-06 19:17:23,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:23,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 205 [2019-11-06 19:17:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:23,054 INFO L225 Difference]: With dead ends: 14973 [2019-11-06 19:17:23,054 INFO L226 Difference]: Without dead ends: 9081 [2019-11-06 19:17:23,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:17:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2019-11-06 19:17:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 9011. [2019-11-06 19:17:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9011 states. [2019-11-06 19:17:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 11771 transitions. [2019-11-06 19:17:23,309 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 11771 transitions. Word has length 205 [2019-11-06 19:17:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:23,310 INFO L462 AbstractCegarLoop]: Abstraction has 9011 states and 11771 transitions. [2019-11-06 19:17:23,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 11771 transitions. [2019-11-06 19:17:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-11-06 19:17:23,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:23,319 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:23,319 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:23,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1486171337, now seen corresponding path program 1 times [2019-11-06 19:17:23,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:23,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036713895] [2019-11-06 19:17:23,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:17:23,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036713895] [2019-11-06 19:17:23,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967832855] [2019-11-06 19:17:23,856 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 19:17:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:24,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:24,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:17:24,305 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:24,305 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:17:24,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91863906] [2019-11-06 19:17:24,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:17:24,307 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:24,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:17:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:24,307 INFO L87 Difference]: Start difference. First operand 9011 states and 11771 transitions. Second operand 3 states. [2019-11-06 19:17:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:26,609 INFO L93 Difference]: Finished difference Result 21065 states and 27828 transitions. [2019-11-06 19:17:26,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:17:26,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 386 [2019-11-06 19:17:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:26,675 INFO L225 Difference]: With dead ends: 21065 [2019-11-06 19:17:26,675 INFO L226 Difference]: Without dead ends: 12060 [2019-11-06 19:17:26,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 391 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 19:17:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12060 states. [2019-11-06 19:17:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12060 to 11382. [2019-11-06 19:17:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11382 states. [2019-11-06 19:17:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11382 states to 11382 states and 14474 transitions. [2019-11-06 19:17:27,078 INFO L78 Accepts]: Start accepts. Automaton has 11382 states and 14474 transitions. Word has length 386 [2019-11-06 19:17:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:27,080 INFO L462 AbstractCegarLoop]: Abstraction has 11382 states and 14474 transitions. [2019-11-06 19:17:27,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:17:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 11382 states and 14474 transitions. [2019-11-06 19:17:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2019-11-06 19:17:27,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:27,094 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:27,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:27,308 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash -431149942, now seen corresponding path program 1 times [2019-11-06 19:17:27,308 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:27,309 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032690529] [2019-11-06 19:17:27,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:17:28,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032690529] [2019-11-06 19:17:28,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618466730] [2019-11-06 19:17:28,254 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 19:17:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:28,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 281 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:28,801 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:28,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:17:28,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778711625] [2019-11-06 19:17:28,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:28,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:28,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:28,808 INFO L87 Difference]: Start difference. First operand 11382 states and 14474 transitions. Second operand 11 states.