/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:15:33,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:15:33,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:15:33,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:15:33,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:15:33,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:15:33,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:15:33,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:15:33,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:15:33,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:15:33,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:15:33,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:15:33,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:15:33,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:15:33,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:15:33,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:15:33,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:15:33,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:15:33,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:15:33,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:15:33,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:15:33,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:15:33,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:15:33,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:15:33,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:15:33,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:15:33,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:15:33,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:15:33,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:15:33,132 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:15:33,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:15:33,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:15:33,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:15:33,134 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:15:33,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:15:33,135 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:15:33,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:15:33,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:15:33,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:15:33,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:15:33,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:15:33,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:15:33,136 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:15:33,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:15:33,136 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:15:33,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:15:33,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:15:33,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:15:33,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:15:33,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:15:33,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:33,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:15:33,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:15:33,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:15:33,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:15:33,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:15:33,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:15:33,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:15:33,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:15:33,447 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:15:33,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:15:33,452 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:15:33,452 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:15:33,453 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-11-06 19:15:33,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c9f613d0/6ca5c49fac7445618650ac13049986ff/FLAGf7b24b23d [2019-11-06 19:15:34,128 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:34,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-11-06 19:15:34,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c9f613d0/6ca5c49fac7445618650ac13049986ff/FLAGf7b24b23d [2019-11-06 19:15:34,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c9f613d0/6ca5c49fac7445618650ac13049986ff [2019-11-06 19:15:34,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:34,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:34,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:34,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:34,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:34,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:34" (1/1) ... [2019-11-06 19:15:34,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2737cc05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:34, skipping insertion in model container [2019-11-06 19:15:34,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:34" (1/1) ... [2019-11-06 19:15:34,343 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:34,433 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:35,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:35,498 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:35,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:35,854 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:35,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35 WrapperNode [2019-11-06 19:15:35,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:35,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:35,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:35,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:35,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... [2019-11-06 19:15:35,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... [2019-11-06 19:15:35,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... [2019-11-06 19:15:35,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... [2019-11-06 19:15:35,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... [2019-11-06 19:15:36,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... [2019-11-06 19:15:36,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... [2019-11-06 19:15:36,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:36,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:36,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:36,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:36,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:15:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:15:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:39,460 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:39,460 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:39,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:39 BoogieIcfgContainer [2019-11-06 19:15:39,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:39,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:39,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:39,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:39,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:34" (1/3) ... [2019-11-06 19:15:39,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19989f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:39, skipping insertion in model container [2019-11-06 19:15:39,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:35" (2/3) ... [2019-11-06 19:15:39,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19989f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:39, skipping insertion in model container [2019-11-06 19:15:39,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:39" (3/3) ... [2019-11-06 19:15:39,470 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2019-11-06 19:15:39,480 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:39,489 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:39,501 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:39,531 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:39,531 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:39,531 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:39,532 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:39,532 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:39,532 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:39,532 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:39,532 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:15:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 19:15:39,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:39,568 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] [2019-11-06 19:15:39,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash -436791267, now seen corresponding path program 1 times [2019-11-06 19:15:39,583 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:39,583 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009803823] [2019-11-06 19:15:39,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:39,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009803823] [2019-11-06 19:15:39,917 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:39,917 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:39,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502435879] [2019-11-06 19:15:39,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:39,925 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:39,942 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:15:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:47,314 INFO L93 Difference]: Finished difference Result 1528 states and 2801 transitions. [2019-11-06 19:15:47,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:47,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-06 19:15:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:47,345 INFO L225 Difference]: With dead ends: 1528 [2019-11-06 19:15:47,346 INFO L226 Difference]: Without dead ends: 1022 [2019-11-06 19:15:47,357 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 19:15:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2019-11-06 19:15:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1016. [2019-11-06 19:15:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2019-11-06 19:15:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1523 transitions. [2019-11-06 19:15:47,492 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1523 transitions. Word has length 21 [2019-11-06 19:15:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:47,493 INFO L462 AbstractCegarLoop]: Abstraction has 1016 states and 1523 transitions. [2019-11-06 19:15:47,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1523 transitions. [2019-11-06 19:15:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 19:15:47,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:47,504 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:15:47,504 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:47,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1982781274, now seen corresponding path program 1 times [2019-11-06 19:15:47,505 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:47,505 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977433704] [2019-11-06 19:15:47,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:47,912 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977433704] [2019-11-06 19:15:47,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569978697] [2019-11-06 19:15:47,913 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 19:15:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:48,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:48,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:48,128 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:48,128 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:48,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275659272] [2019-11-06 19:15:48,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:48,131 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:48,132 INFO L87 Difference]: Start difference. First operand 1016 states and 1523 transitions. Second operand 3 states. [2019-11-06 19:15:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:50,639 INFO L93 Difference]: Finished difference Result 2961 states and 4483 transitions. [2019-11-06 19:15:50,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:50,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-06 19:15:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:50,651 INFO L225 Difference]: With dead ends: 2961 [2019-11-06 19:15:50,651 INFO L226 Difference]: Without dead ends: 1951 [2019-11-06 19:15:50,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2019-11-06 19:15:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1949. [2019-11-06 19:15:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1949 states. [2019-11-06 19:15:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2576 transitions. [2019-11-06 19:15:50,714 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2576 transitions. Word has length 90 [2019-11-06 19:15:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:50,715 INFO L462 AbstractCegarLoop]: Abstraction has 1949 states and 2576 transitions. [2019-11-06 19:15:50,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2576 transitions. [2019-11-06 19:15:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-06 19:15:50,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:50,724 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:15:50,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:50,933 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1546364994, now seen corresponding path program 1 times [2019-11-06 19:15:50,934 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:50,934 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928151772] [2019-11-06 19:15:50,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 19:15:51,382 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928151772] [2019-11-06 19:15:51,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093977431] [2019-11-06 19:15:51,383 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 19:15:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:15:51,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 19:15:51,563 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:51,563 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 19:15:51,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176926015] [2019-11-06 19:15:51,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:15:51,567 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:51,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:15:51,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:15:51,568 INFO L87 Difference]: Start difference. First operand 1949 states and 2576 transitions. Second operand 8 states. [2019-11-06 19:15:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:57,783 INFO L93 Difference]: Finished difference Result 5832 states and 7801 transitions. [2019-11-06 19:15:57,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:15:57,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 199 [2019-11-06 19:15:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:57,812 INFO L225 Difference]: With dead ends: 5832 [2019-11-06 19:15:57,812 INFO L226 Difference]: Without dead ends: 3889 [2019-11-06 19:15:57,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2019-11-06 19:15:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3540. [2019-11-06 19:15:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2019-11-06 19:15:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4406 transitions. [2019-11-06 19:15:57,938 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4406 transitions. Word has length 199 [2019-11-06 19:15:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:57,939 INFO L462 AbstractCegarLoop]: Abstraction has 3540 states and 4406 transitions. [2019-11-06 19:15:57,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:15:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4406 transitions. [2019-11-06 19:15:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-11-06 19:15:57,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:57,945 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:58,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:58,154 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:58,154 INFO L82 PathProgramCache]: Analyzing trace with hash -666228620, now seen corresponding path program 1 times [2019-11-06 19:15:58,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:58,155 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36409596] [2019-11-06 19:15:58,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:15:58,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36409596] [2019-11-06 19:15:58,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391943612] [2019-11-06 19:15:58,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 19:15:58,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:58,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:15:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 19:15:58,999 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:58,999 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:15:58,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465252539] [2019-11-06 19:15:59,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:59,000 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:59,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:59,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:59,001 INFO L87 Difference]: Start difference. First operand 3540 states and 4406 transitions. Second operand 5 states. [2019-11-06 19:16:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:02,460 INFO L93 Difference]: Finished difference Result 7143 states and 8946 transitions. [2019-11-06 19:16:02,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:02,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2019-11-06 19:16:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:02,483 INFO L225 Difference]: With dead ends: 7143 [2019-11-06 19:16:02,483 INFO L226 Difference]: Without dead ends: 3609 [2019-11-06 19:16:02,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:16:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2019-11-06 19:16:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3562. [2019-11-06 19:16:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3562 states. [2019-11-06 19:16:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 4435 transitions. [2019-11-06 19:16:02,581 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 4435 transitions. Word has length 301 [2019-11-06 19:16:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:02,582 INFO L462 AbstractCegarLoop]: Abstraction has 3562 states and 4435 transitions. [2019-11-06 19:16:02,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 4435 transitions. [2019-11-06 19:16:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2019-11-06 19:16:02,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:02,589 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:02,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:02,801 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash 579508701, now seen corresponding path program 1 times [2019-11-06 19:16:02,801 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:02,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514358789] [2019-11-06 19:16:02,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:16:03,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514358789] [2019-11-06 19:16:03,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587876653] [2019-11-06 19:16:03,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:03,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:03,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:03,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:16:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:03,748 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:03,748 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-06 19:16:03,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812261869] [2019-11-06 19:16:03,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:16:03,749 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:03,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:16:03,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:16:03,750 INFO L87 Difference]: Start difference. First operand 3562 states and 4435 transitions. Second operand 9 states.