/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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:17,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:17,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:17,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:17,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:17,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:17,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:17,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:17,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:17,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:17,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:17,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:17,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:17,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:17,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:17,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:17,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:17,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:17,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:17,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:17,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:17,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:17,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:17,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:17,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:17,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:17,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:17,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:17,893 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 19:19:17,916 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:17,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:17,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:17,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:17,918 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:17,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:17,918 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:17,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:17,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:17,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:17,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:17,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:17,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:17,920 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:17,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:17,920 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:17,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:17,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:17,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:17,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:17,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:17,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:17,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:17,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:17,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:17,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:17,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:17,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:17,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:18,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:18,233 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:18,236 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:18,238 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:18,238 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:18,239 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-11-06 19:19:18,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e339ee888/2e6c871134a944fe866ef1a54cd8b04d/FLAG3139f7b80 [2019-11-06 19:19:19,012 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:19,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-11-06 19:19:19,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e339ee888/2e6c871134a944fe866ef1a54cd8b04d/FLAG3139f7b80 [2019-11-06 19:19:19,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e339ee888/2e6c871134a944fe866ef1a54cd8b04d [2019-11-06 19:19:19,162 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:19,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:19,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:19,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:19,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:19,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:19" (1/1) ... [2019-11-06 19:19:19,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6deb8361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:19, skipping insertion in model container [2019-11-06 19:19:19,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:19" (1/1) ... [2019-11-06 19:19:19,184 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:19,272 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:20,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:20,067 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:20,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:20,308 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:20,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20 WrapperNode [2019-11-06 19:19:20,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:20,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:20,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:20,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:20,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (1/1) ... [2019-11-06 19:19:20,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (1/1) ... [2019-11-06 19:19:20,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (1/1) ... [2019-11-06 19:19:20,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (1/1) ... [2019-11-06 19:19:20,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (1/1) ... [2019-11-06 19:19:20,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (1/1) ... [2019-11-06 19:19:20,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (1/1) ... [2019-11-06 19:19:20,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:20,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:20,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:20,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:20,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (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 19:19:20,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:20,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:20,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:20,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:20,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:20,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:20,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:20,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:22,990 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:22,991 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:22,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:22 BoogieIcfgContainer [2019-11-06 19:19:22,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:22,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:22,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:22,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:22,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:19" (1/3) ... [2019-11-06 19:19:22,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bf3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:22, skipping insertion in model container [2019-11-06 19:19:22,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:20" (2/3) ... [2019-11-06 19:19:22,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bf3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:22, skipping insertion in model container [2019-11-06 19:19:22,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:22" (3/3) ... [2019-11-06 19:19:23,001 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2019-11-06 19:19:23,012 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:23,022 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:23,035 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:23,066 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:23,066 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:23,067 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:23,067 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:23,067 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:23,067 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:23,067 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:23,067 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 19:19:23,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:23,106 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:23,108 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1859248590, now seen corresponding path program 1 times [2019-11-06 19:19:23,123 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:23,123 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067900538] [2019-11-06 19:19:23,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:23,533 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 19:19:23,533 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067900538] [2019-11-06 19:19:23,537 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:23,537 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:23,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109834786] [2019-11-06 19:19:23,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:23,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:23,561 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:29,479 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:19:29,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:29,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-06 19:19:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:29,507 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:29,507 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:29,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-11-06 19:19:29,637 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 63 [2019-11-06 19:19:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:29,638 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-11-06 19:19:29,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-11-06 19:19:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:19:29,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:29,653 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:19:29,653 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1694919497, now seen corresponding path program 1 times [2019-11-06 19:19:29,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:29,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236270641] [2019-11-06 19:19:29,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:30,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236270641] [2019-11-06 19:19:30,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817684301] [2019-11-06 19:19:30,210 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 19:19:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:30,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:30,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 19:19:30,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:30,487 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:19:30,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196954504] [2019-11-06 19:19:30,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:30,490 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:30,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:30,491 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-11-06 19:19:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:33,472 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-11-06 19:19:33,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:33,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-11-06 19:19:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:33,492 INFO L225 Difference]: With dead ends: 3131 [2019-11-06 19:19:33,492 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 19:19:33,499 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 19:19:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-11-06 19:19:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-11-06 19:19:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-11-06 19:19:33,608 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 230 [2019-11-06 19:19:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:33,612 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-11-06 19:19:33,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-11-06 19:19:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:19:33,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:33,625 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:19:33,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:33,832 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 142778751, now seen corresponding path program 1 times [2019-11-06 19:19:33,833 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:33,833 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60919727] [2019-11-06 19:19:33,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 112 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:34,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60919727] [2019-11-06 19:19:34,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017768113] [2019-11-06 19:19:34,223 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 19:19:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:34,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:34,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 19:19:34,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:34,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:34,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450671697] [2019-11-06 19:19:34,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:34,410 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:34,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:34,411 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-11-06 19:19:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:37,132 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-11-06 19:19:37,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:37,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-11-06 19:19:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:37,158 INFO L225 Difference]: With dead ends: 6302 [2019-11-06 19:19:37,159 INFO L226 Difference]: Without dead ends: 4230 [2019-11-06 19:19:37,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-11-06 19:19:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-11-06 19:19:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-11-06 19:19:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5868 transitions. [2019-11-06 19:19:37,297 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5868 transitions. Word has length 234 [2019-11-06 19:19:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:37,299 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5868 transitions. [2019-11-06 19:19:37,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5868 transitions. [2019-11-06 19:19:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-11-06 19:19:37,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:37,307 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, 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, 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] [2019-11-06 19:19:37,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:37,515 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash 654408271, now seen corresponding path program 1 times [2019-11-06 19:19:37,516 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:37,516 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796009260] [2019-11-06 19:19:37,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 249 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:19:37,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796009260] [2019-11-06 19:19:37,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168276102] [2019-11-06 19:19:37,974 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 19:19:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:38,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 366 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 19:19:38,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:38,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:19:38,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015787994] [2019-11-06 19:19:38,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:38,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:38,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:38,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:38,212 INFO L87 Difference]: Start difference. First operand 4208 states and 5868 transitions. Second operand 11 states. [2019-11-06 19:19:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:43,215 INFO L93 Difference]: Finished difference Result 10864 states and 15768 transitions. [2019-11-06 19:19:43,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:43,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 338 [2019-11-06 19:19:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:43,249 INFO L225 Difference]: With dead ends: 10864 [2019-11-06 19:19:43,249 INFO L226 Difference]: Without dead ends: 6662 [2019-11-06 19:19:43,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 345 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:19:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-11-06 19:19:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4930. [2019-11-06 19:19:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2019-11-06 19:19:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6891 transitions. [2019-11-06 19:19:43,415 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6891 transitions. Word has length 338 [2019-11-06 19:19:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:43,415 INFO L462 AbstractCegarLoop]: Abstraction has 4930 states and 6891 transitions. [2019-11-06 19:19:43,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6891 transitions. [2019-11-06 19:19:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2019-11-06 19:19:43,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:43,425 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, 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, 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] [2019-11-06 19:19:43,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:43,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:43,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1714892967, now seen corresponding path program 1 times [2019-11-06 19:19:43,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:43,630 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554167996] [2019-11-06 19:19:43,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 168 proven. 206 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-06 19:19:44,251 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554167996] [2019-11-06 19:19:44,251 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303724762] [2019-11-06 19:19:44,252 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 19:19:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:44,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:44,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2019-11-06 19:19:44,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:44,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:44,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003087345] [2019-11-06 19:19:44,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:44,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:44,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:44,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:44,809 INFO L87 Difference]: Start difference. First operand 4930 states and 6891 transitions. Second operand 5 states. [2019-11-06 19:19:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:47,375 INFO L93 Difference]: Finished difference Result 11257 states and 15760 transitions. [2019-11-06 19:19:47,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:19:47,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 414 [2019-11-06 19:19:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:47,404 INFO L225 Difference]: With dead ends: 11257 [2019-11-06 19:19:47,405 INFO L226 Difference]: Without dead ends: 6333 [2019-11-06 19:19:47,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2019-11-06 19:19:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 6307. [2019-11-06 19:19:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2019-11-06 19:19:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8081 transitions. [2019-11-06 19:19:47,588 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8081 transitions. Word has length 414 [2019-11-06 19:19:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:47,589 INFO L462 AbstractCegarLoop]: Abstraction has 6307 states and 8081 transitions. [2019-11-06 19:19:47,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8081 transitions. [2019-11-06 19:19:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2019-11-06 19:19:47,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:47,607 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, 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, 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] [2019-11-06 19:19:47,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:47,811 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash 187773675, now seen corresponding path program 1 times [2019-11-06 19:19:47,813 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:47,813 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657995184] [2019-11-06 19:19:47,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 284 proven. 100 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-06 19:19:48,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657995184] [2019-11-06 19:19:48,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360937729] [2019-11-06 19:19:48,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:48,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 426 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 19:19:49,244 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:49,245 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:49,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110184113] [2019-11-06 19:19:49,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:49,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:49,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:49,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:49,249 INFO L87 Difference]: Start difference. First operand 6307 states and 8081 transitions. Second operand 11 states.