/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_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:40,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:40,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:40,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:17:40,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:40,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:40,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:40,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:40,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:40,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:40,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:40,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:40,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:40,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:40,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:40,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:40,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:17:40,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:17:40,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:17:40,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:17:40,352 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 19:17:40,370 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:40,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:40,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:40,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:40,375 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:40,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:40,376 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:40,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:40,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:40,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:40,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:40,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:40,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:40,378 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:40,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:40,378 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:40,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:40,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:40,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:40,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:40,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:40,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:40,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:40,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:40,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:40,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:40,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:40,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:40,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:40,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:40,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:40,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:40,710 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:40,710 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:40,711 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-11-06 19:17:40,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e34d433/538c1db525594f2093257aff4c2e3028/FLAGcb5b0a3ff [2019-11-06 19:17:41,442 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:41,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-11-06 19:17:41,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e34d433/538c1db525594f2093257aff4c2e3028/FLAGcb5b0a3ff [2019-11-06 19:17:41,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e34d433/538c1db525594f2093257aff4c2e3028 [2019-11-06 19:17:41,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:41,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:41,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:41,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:41,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:41,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6051b70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41, skipping insertion in model container [2019-11-06 19:17:41,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,616 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:41,696 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:42,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:42,455 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:42,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:42,732 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:42,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42 WrapperNode [2019-11-06 19:17:42,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:42,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:42,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:42,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:42,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:42,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:42,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:42,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:42,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (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 19:17:42,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:42,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:42,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:42,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:42,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:42,991 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:42,991 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:42,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:42,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:42,991 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:45,354 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:45,354 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:45,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:45 BoogieIcfgContainer [2019-11-06 19:17:45,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:45,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:45,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:45,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:45,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:41" (1/3) ... [2019-11-06 19:17:45,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63340c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:45, skipping insertion in model container [2019-11-06 19:17:45,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42" (2/3) ... [2019-11-06 19:17:45,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63340c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:45, skipping insertion in model container [2019-11-06 19:17:45,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:45" (3/3) ... [2019-11-06 19:17:45,365 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label19.c [2019-11-06 19:17:45,375 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:45,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:45,396 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:45,441 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:45,441 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:45,441 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:45,441 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:45,441 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:45,442 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:45,442 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:45,442 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 19:17:45,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:45,489 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] [2019-11-06 19:17:45,491 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1232696998, now seen corresponding path program 1 times [2019-11-06 19:17:45,505 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:45,505 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11565530] [2019-11-06 19:17:45,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:45,964 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 19:17:45,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11565530] [2019-11-06 19:17:45,966 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:45,966 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:45,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194731925] [2019-11-06 19:17:45,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:45,974 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:45,990 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:50,842 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:17:50,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:50,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-11-06 19:17:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:50,871 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:17:50,871 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:50,882 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 19:17:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-11-06 19:17:51,024 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 49 [2019-11-06 19:17:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:51,025 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-11-06 19:17:51,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-11-06 19:17:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 19:17:51,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:51,042 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:51,042 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash -768303897, now seen corresponding path program 1 times [2019-11-06 19:17:51,044 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:51,044 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069414206] [2019-11-06 19:17:51,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:51,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069414206] [2019-11-06 19:17:51,355 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:51,355 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:17:51,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954040040] [2019-11-06 19:17:51,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:17:51,362 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:17:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:17:51,362 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-11-06 19:17:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:55,269 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-11-06 19:17:55,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:55,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-11-06 19:17:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:55,291 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:17:55,291 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:17:55,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:17:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:17:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-11-06 19:17:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-11-06 19:17:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-11-06 19:17:55,402 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 118 [2019-11-06 19:17:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:55,404 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-11-06 19:17:55,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:17:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-11-06 19:17:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 19:17:55,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:55,408 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:55,409 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash -825960706, now seen corresponding path program 1 times [2019-11-06 19:17:55,410 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:55,410 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379825351] [2019-11-06 19:17:55,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:55,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379825351] [2019-11-06 19:17:55,770 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:55,770 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:55,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392265083] [2019-11-06 19:17:55,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:55,771 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:55,774 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-11-06 19:18:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:01,025 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-11-06 19:18:01,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:18:01,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2019-11-06 19:18:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:01,047 INFO L225 Difference]: With dead ends: 4170 [2019-11-06 19:18:01,047 INFO L226 Difference]: Without dead ends: 2792 [2019-11-06 19:18:01,052 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:18:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-11-06 19:18:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-11-06 19:18:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-11-06 19:18:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3896 transitions. [2019-11-06 19:18:01,133 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3896 transitions. Word has length 121 [2019-11-06 19:18:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:01,134 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3896 transitions. [2019-11-06 19:18:01,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3896 transitions. [2019-11-06 19:18:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 19:18:01,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:01,136 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:01,137 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash -388481722, now seen corresponding path program 1 times [2019-11-06 19:18:01,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:01,138 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040543368] [2019-11-06 19:18:01,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:01,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040543368] [2019-11-06 19:18:01,416 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:01,417 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:18:01,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822271156] [2019-11-06 19:18:01,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:18:01,418 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:18:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:01,418 INFO L87 Difference]: Start difference. First operand 2773 states and 3896 transitions. Second operand 9 states. [2019-11-06 19:18:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:07,358 INFO L93 Difference]: Finished difference Result 9052 states and 13211 transitions. [2019-11-06 19:18:07,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:18:07,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-11-06 19:18:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:07,401 INFO L225 Difference]: With dead ends: 9052 [2019-11-06 19:18:07,402 INFO L226 Difference]: Without dead ends: 6285 [2019-11-06 19:18:07,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:18:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2019-11-06 19:18:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6259. [2019-11-06 19:18:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6259 states. [2019-11-06 19:18:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8351 transitions. [2019-11-06 19:18:07,766 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8351 transitions. Word has length 125 [2019-11-06 19:18:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:07,768 INFO L462 AbstractCegarLoop]: Abstraction has 6259 states and 8351 transitions. [2019-11-06 19:18:07,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8351 transitions. [2019-11-06 19:18:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 19:18:07,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:07,770 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:07,773 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash -358644173, now seen corresponding path program 1 times [2019-11-06 19:18:07,774 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:07,776 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693138531] [2019-11-06 19:18:07,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:08,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693138531] [2019-11-06 19:18:08,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937789520] [2019-11-06 19:18:08,008 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 19:18:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:08,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:08,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:08,193 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:08,193 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:18:08,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146706552] [2019-11-06 19:18:08,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:18:08,194 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:18:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:18:08,195 INFO L87 Difference]: Start difference. First operand 6259 states and 8351 transitions. Second operand 3 states. [2019-11-06 19:18:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:09,954 INFO L93 Difference]: Finished difference Result 14553 states and 19735 transitions. [2019-11-06 19:18:09,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:18:09,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-11-06 19:18:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:09,996 INFO L225 Difference]: With dead ends: 14553 [2019-11-06 19:18:09,996 INFO L226 Difference]: Without dead ends: 8300 [2019-11-06 19:18:10,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:18:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2019-11-06 19:18:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 8300. [2019-11-06 19:18:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8300 states. [2019-11-06 19:18:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 10767 transitions. [2019-11-06 19:18:10,247 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 10767 transitions. Word has length 140 [2019-11-06 19:18:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:10,247 INFO L462 AbstractCegarLoop]: Abstraction has 8300 states and 10767 transitions. [2019-11-06 19:18:10,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:18:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 10767 transitions. [2019-11-06 19:18:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2019-11-06 19:18:10,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:10,271 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:10,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:10,485 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:10,486 INFO L82 PathProgramCache]: Analyzing trace with hash -473938833, now seen corresponding path program 1 times [2019-11-06 19:18:10,486 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:10,486 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765064143] [2019-11-06 19:18:10,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 207 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:18:11,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765064143] [2019-11-06 19:18:11,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994538426] [2019-11-06 19:18:11,481 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 19:18:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:11,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-06 19:18:11,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:11,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:18:11,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112830609] [2019-11-06 19:18:11,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:11,946 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:11,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:11,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:11,947 INFO L87 Difference]: Start difference. First operand 8300 states and 10767 transitions. Second operand 11 states. [2019-11-06 19:18:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:16,157 INFO L93 Difference]: Finished difference Result 21056 states and 27884 transitions. [2019-11-06 19:18:16,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:18:16,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 524 [2019-11-06 19:18:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:16,217 INFO L225 Difference]: With dead ends: 21056 [2019-11-06 19:18:16,217 INFO L226 Difference]: Without dead ends: 10997 [2019-11-06 19:18:16,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 533 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:18:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10997 states. [2019-11-06 19:18:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10997 to 8933. [2019-11-06 19:18:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8933 states. [2019-11-06 19:18:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 10042 transitions. [2019-11-06 19:18:16,469 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 10042 transitions. Word has length 524 [2019-11-06 19:18:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:16,469 INFO L462 AbstractCegarLoop]: Abstraction has 8933 states and 10042 transitions. [2019-11-06 19:18:16,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 10042 transitions. [2019-11-06 19:18:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2019-11-06 19:18:16,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:16,505 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:18:16,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:16,710 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:16,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2124937089, now seen corresponding path program 1 times [2019-11-06 19:18:16,711 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:16,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216087214] [2019-11-06 19:18:16,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat