/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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:01,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:01,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:01,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:17:01,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:01,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:01,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:01,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:01,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:01,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:01,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:01,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:01,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:01,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:01,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:01,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:01,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:17:01,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:17:01,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:17:01,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:17:01,720 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 19:17:01,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:01,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:01,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:01,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:01,736 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:01,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:01,736 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:01,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:01,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:01,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:01,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:01,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:01,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:01,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:01,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:01,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:01,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:01,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:01,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:01,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:01,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:01,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:01,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:01,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:01,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:01,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:01,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:01,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:01,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:02,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:02,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:02,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:02,033 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:02,034 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:02,034 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-11-06 19:17:02,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354a90a5c/ba7b4f799037425b8f5eef1af4eb20c1/FLAGa15f788a6 [2019-11-06 19:17:02,727 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:02,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-11-06 19:17:02,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354a90a5c/ba7b4f799037425b8f5eef1af4eb20c1/FLAGa15f788a6 [2019-11-06 19:17:02,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354a90a5c/ba7b4f799037425b8f5eef1af4eb20c1 [2019-11-06 19:17:02,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:02,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:02,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:02,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:02,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:02,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e65c51e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02, skipping insertion in model container [2019-11-06 19:17:02,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:03,000 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:03,076 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:03,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:03,864 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:04,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:04,263 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:04,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04 WrapperNode [2019-11-06 19:17:04,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:04,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:04,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:04,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:04,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (1/1) ... [2019-11-06 19:17:04,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (1/1) ... [2019-11-06 19:17:04,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (1/1) ... [2019-11-06 19:17:04,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (1/1) ... [2019-11-06 19:17:04,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (1/1) ... [2019-11-06 19:17:04,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (1/1) ... [2019-11-06 19:17:04,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (1/1) ... [2019-11-06 19:17:04,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:04,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:04,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:04,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:04,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (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 19:17:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:04,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:04,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:06,892 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:06,892 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:06,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:06 BoogieIcfgContainer [2019-11-06 19:17:06,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:06,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:06,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:06,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:06,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:02" (1/3) ... [2019-11-06 19:17:06,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578431a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:06, skipping insertion in model container [2019-11-06 19:17:06,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:04" (2/3) ... [2019-11-06 19:17:06,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578431a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:06, skipping insertion in model container [2019-11-06 19:17:06,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:06" (3/3) ... [2019-11-06 19:17:06,915 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label10.c [2019-11-06 19:17:06,927 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:06,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:06,952 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:06,992 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:06,993 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:06,993 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:06,993 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:06,993 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:06,993 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:06,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:06,994 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 19:17:07,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:07,028 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] [2019-11-06 19:17:07,030 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1129192547, now seen corresponding path program 1 times [2019-11-06 19:17:07,046 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:07,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566292633] [2019-11-06 19:17:07,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:07,383 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 19:17:07,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566292633] [2019-11-06 19:17:07,385 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:07,385 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:07,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67314127] [2019-11-06 19:17:07,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:07,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:07,409 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:14,726 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:17:14,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:14,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-11-06 19:17:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:14,753 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:17:14,754 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:14,765 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 19:17:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1751 transitions. [2019-11-06 19:17:14,885 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1751 transitions. Word has length 38 [2019-11-06 19:17:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:14,886 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1751 transitions. [2019-11-06 19:17:14,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1751 transitions. [2019-11-06 19:17:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 19:17:14,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:14,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:14,892 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2138729124, now seen corresponding path program 1 times [2019-11-06 19:17:14,893 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:14,893 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15920529] [2019-11-06 19:17:14,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:15,158 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15920529] [2019-11-06 19:17:15,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:15,158 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:15,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312578778] [2019-11-06 19:17:15,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:15,161 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:15,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:15,162 INFO L87 Difference]: Start difference. First operand 1031 states and 1751 transitions. Second operand 9 states. [2019-11-06 19:17:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:19,184 INFO L93 Difference]: Finished difference Result 3130 states and 5428 transitions. [2019-11-06 19:17:19,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:19,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2019-11-06 19:17:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:19,199 INFO L225 Difference]: With dead ends: 3130 [2019-11-06 19:17:19,199 INFO L226 Difference]: Without dead ends: 2105 [2019-11-06 19:17:19,204 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 19:17:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2019-11-06 19:17:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2073. [2019-11-06 19:17:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-11-06 19:17:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3396 transitions. [2019-11-06 19:17:19,283 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3396 transitions. Word has length 108 [2019-11-06 19:17:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:19,283 INFO L462 AbstractCegarLoop]: Abstraction has 2073 states and 3396 transitions. [2019-11-06 19:17:19,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3396 transitions. [2019-11-06 19:17:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 19:17:19,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:19,289 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:19,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash -899506204, now seen corresponding path program 1 times [2019-11-06 19:17:19,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:19,290 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219930018] [2019-11-06 19:17:19,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:19,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219930018] [2019-11-06 19:17:19,562 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:19,562 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:19,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484086021] [2019-11-06 19:17:19,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:19,565 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:19,566 INFO L87 Difference]: Start difference. First operand 2073 states and 3396 transitions. Second operand 9 states. [2019-11-06 19:17:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:25,309 INFO L93 Difference]: Finished difference Result 7992 states and 13707 transitions. [2019-11-06 19:17:25,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:17:25,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2019-11-06 19:17:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:25,348 INFO L225 Difference]: With dead ends: 7992 [2019-11-06 19:17:25,348 INFO L226 Difference]: Without dead ends: 5925 [2019-11-06 19:17:25,355 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 19:17:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2019-11-06 19:17:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5898. [2019-11-06 19:17:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5898 states. [2019-11-06 19:17:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5898 states to 5898 states and 8923 transitions. [2019-11-06 19:17:25,574 INFO L78 Accepts]: Start accepts. Automaton has 5898 states and 8923 transitions. Word has length 136 [2019-11-06 19:17:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:25,575 INFO L462 AbstractCegarLoop]: Abstraction has 5898 states and 8923 transitions. [2019-11-06 19:17:25,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5898 states and 8923 transitions. [2019-11-06 19:17:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-06 19:17:25,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:25,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:25,578 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash 689117204, now seen corresponding path program 1 times [2019-11-06 19:17:25,579 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:25,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203470875] [2019-11-06 19:17:25,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:25,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203470875] [2019-11-06 19:17:25,897 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:25,897 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:25,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587338425] [2019-11-06 19:17:25,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:25,898 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:25,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:25,899 INFO L87 Difference]: Start difference. First operand 5898 states and 8923 transitions. Second operand 9 states. [2019-11-06 19:17:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:29,445 INFO L93 Difference]: Finished difference Result 14973 states and 23283 transitions. [2019-11-06 19:17:29,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:29,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-11-06 19:17:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:29,494 INFO L225 Difference]: With dead ends: 14973 [2019-11-06 19:17:29,494 INFO L226 Difference]: Without dead ends: 9081 [2019-11-06 19:17:29,514 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 19:17:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2019-11-06 19:17:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 9011. [2019-11-06 19:17:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9011 states. [2019-11-06 19:17:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 11768 transitions. [2019-11-06 19:17:29,850 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 11768 transitions. Word has length 176 [2019-11-06 19:17:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:29,851 INFO L462 AbstractCegarLoop]: Abstraction has 9011 states and 11768 transitions. [2019-11-06 19:17:29,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 11768 transitions. [2019-11-06 19:17:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-11-06 19:17:29,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:29,859 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:29,859 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:29,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1385122856, now seen corresponding path program 1 times [2019-11-06 19:17:29,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:29,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364243078] [2019-11-06 19:17:29,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:17:30,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364243078] [2019-11-06 19:17:30,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736461854] [2019-11-06 19:17:30,316 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 19:17:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:30,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:30,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:17:30,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:30,727 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:17:30,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816910247] [2019-11-06 19:17:30,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:17:30,729 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:30,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:17:30,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:30,729 INFO L87 Difference]: Start difference. First operand 9011 states and 11768 transitions. Second operand 3 states. [2019-11-06 19:17:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:33,073 INFO L93 Difference]: Finished difference Result 21065 states and 27822 transitions. [2019-11-06 19:17:33,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:17:33,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 357 [2019-11-06 19:17:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:33,116 INFO L225 Difference]: With dead ends: 21065 [2019-11-06 19:17:33,117 INFO L226 Difference]: Without dead ends: 12060 [2019-11-06 19:17:33,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 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 19:17:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12060 states. [2019-11-06 19:17:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12060 to 11382. [2019-11-06 19:17:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11382 states. [2019-11-06 19:17:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11382 states to 11382 states and 14471 transitions. [2019-11-06 19:17:33,450 INFO L78 Accepts]: Start accepts. Automaton has 11382 states and 14471 transitions. Word has length 357 [2019-11-06 19:17:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:33,451 INFO L462 AbstractCegarLoop]: Abstraction has 11382 states and 14471 transitions. [2019-11-06 19:17:33,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:17:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 11382 states and 14471 transitions. [2019-11-06 19:17:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2019-11-06 19:17:33,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:33,464 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:17:33,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:33,669 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:33,670 INFO L82 PathProgramCache]: Analyzing trace with hash 793181941, now seen corresponding path program 1 times [2019-11-06 19:17:33,670 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:33,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576841606] [2019-11-06 19:17:33,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:17:34,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576841606] [2019-11-06 19:17:34,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652584376] [2019-11-06 19:17:34,440 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 19:17:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:34,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:34,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:34,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:34,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:17:34,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676423998] [2019-11-06 19:17:34,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:34,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:34,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:34,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:34,733 INFO L87 Difference]: Start difference. First operand 11382 states and 14471 transitions. Second operand 11 states.