/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 08:37:48,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 08:37:48,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 08:37:48,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 08:37:48,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 08:37:48,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 08:37:48,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 08:37:48,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 08:37:48,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 08:37:48,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 08:37:48,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 08:37:48,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 08:37:48,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 08:37:48,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 08:37:48,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 08:37:48,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 08:37:48,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 08:37:48,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 08:37:48,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 08:37:48,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 08:37:48,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 08:37:48,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 08:37:48,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 08:37:48,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 08:37:48,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 08:37:48,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 08:37:48,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 08:37:48,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 08:37:48,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 08:37:48,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 08:37:48,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 08:37:48,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 08:37:48,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 08:37:48,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 08:37:48,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 08:37:48,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 08:37:48,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 08:37:48,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 08:37:48,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 08:37:48,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 08:37:48,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 08:37:48,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 08:37:48,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 08:37:48,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 08:37:48,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 08:37:48,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 08:37:48,173 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 08:37:48,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 08:37:48,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 08:37:48,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 08:37:48,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 08:37:48,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 08:37:48,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 08:37:48,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 08:37:48,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 08:37:48,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 08:37:48,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 08:37:48,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 08:37:48,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 08:37:48,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 08:37:48,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 08:37:48,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 08:37:48,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 08:37:48,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 08:37:48,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 08:37:48,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 08:37:48,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 08:37:48,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 08:37:48,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 08:37:48,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 08:37:48,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 08:37:48,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 08:37:48,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 08:37:48,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 08:37:48,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 08:37:48,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 08:37:48,513 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 08:37:48,514 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label34.c [2020-10-13 08:37:48,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a16e6803c/f40f08be18bc48d8a590d006e49e2374/FLAG05d154036 [2020-10-13 08:37:49,424 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 08:37:49,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label34.c [2020-10-13 08:37:49,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a16e6803c/f40f08be18bc48d8a590d006e49e2374/FLAG05d154036 [2020-10-13 08:37:49,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a16e6803c/f40f08be18bc48d8a590d006e49e2374 [2020-10-13 08:37:49,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 08:37:49,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 08:37:49,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 08:37:49,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 08:37:49,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 08:37:49,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:37:49" (1/1) ... [2020-10-13 08:37:49,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ae34dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:49, skipping insertion in model container [2020-10-13 08:37:49,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:37:49" (1/1) ... [2020-10-13 08:37:49,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 08:37:50,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 08:37:51,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 08:37:51,998 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 08:37:52,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 08:37:52,699 INFO L208 MainTranslator]: Completed translation [2020-10-13 08:37:52,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52 WrapperNode [2020-10-13 08:37:52,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 08:37:52,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 08:37:52,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 08:37:52,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 08:37:52,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... [2020-10-13 08:37:52,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... [2020-10-13 08:37:52,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... [2020-10-13 08:37:52,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... [2020-10-13 08:37:52,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... [2020-10-13 08:37:52,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... [2020-10-13 08:37:52,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... [2020-10-13 08:37:53,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 08:37:53,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 08:37:53,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 08:37:53,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 08:37:53,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-13 08:37:53,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 08:37:53,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 08:37:53,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 08:37:53,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 08:37:53,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 08:37:53,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 08:37:53,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 08:37:53,094 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 08:37:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 08:37:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 08:37:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 08:37:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 08:37:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 08:37:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 08:37:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 08:37:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 08:37:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 08:38:04,483 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 08:38:04,483 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 08:38:04,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:38:04 BoogieIcfgContainer [2020-10-13 08:38:04,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 08:38:04,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 08:38:04,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 08:38:04,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 08:38:04,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:37:49" (1/3) ... [2020-10-13 08:38:04,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be4bc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:38:04, skipping insertion in model container [2020-10-13 08:38:04,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:52" (2/3) ... [2020-10-13 08:38:04,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be4bc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:38:04, skipping insertion in model container [2020-10-13 08:38:04,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:38:04" (3/3) ... [2020-10-13 08:38:04,505 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label34.c [2020-10-13 08:38:04,518 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 08:38:04,527 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 08:38:04,543 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 08:38:04,570 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 08:38:04,570 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 08:38:04,570 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 08:38:04,570 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 08:38:04,570 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 08:38:04,571 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 08:38:04,571 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 08:38:04,571 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 08:38:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-13 08:38:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 08:38:04,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:38:04,625 INFO L422 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] [2020-10-13 08:38:04,625 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:38:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:38:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash -93933433, now seen corresponding path program 1 times [2020-10-13 08:38:04,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:38:04,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403146957] [2020-10-13 08:38:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:38:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:04,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:05,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:05,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 08:38:05,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:05,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-13 08:38:05,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 08:38:05,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 08:38:05,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 08:38:05,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 08:38:05,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:38:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:05,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:05,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:05,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:38:05,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:05,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 08:38:05,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:05,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:38:05,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:05,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:38:05,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 08:38:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:38:05,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403146957] [2020-10-13 08:38:05,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 08:38:05,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 08:38:05,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800909105] [2020-10-13 08:38:05,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 08:38:05,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:38:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 08:38:05,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 08:38:05,631 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-13 08:38:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:38:21,318 INFO L93 Difference]: Finished difference Result 3152 states and 5831 transitions. [2020-10-13 08:38:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:38:21,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-13 08:38:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:38:21,357 INFO L225 Difference]: With dead ends: 3152 [2020-10-13 08:38:21,357 INFO L226 Difference]: Without dead ends: 1954 [2020-10-13 08:38:21,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:38:21,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-13 08:38:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1885. [2020-10-13 08:38:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-13 08:38:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3103 transitions. [2020-10-13 08:38:21,559 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3103 transitions. Word has length 62 [2020-10-13 08:38:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:38:21,561 INFO L479 AbstractCegarLoop]: Abstraction has 1885 states and 3103 transitions. [2020-10-13 08:38:21,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 08:38:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3103 transitions. [2020-10-13 08:38:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 08:38:21,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:38:21,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:38:21,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 08:38:21,582 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:38:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:38:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash -916615170, now seen corresponding path program 1 times [2020-10-13 08:38:21,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:38:21,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620416527] [2020-10-13 08:38:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:38:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:21,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:23,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:23,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 08:38:23,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 08:38:23,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-13 08:38:23,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:38:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-13 08:38:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 08:38:23,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 08:38:23,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:38:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:23,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:23,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:23,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:38:23,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:23,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:38:23,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:23,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:38:23,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:23,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:38:23,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:38:23,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:38:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:23,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:23,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:23,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 08:38:23,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 08:38:23,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:38:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:23,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 08:38:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 08:38:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:38:23,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620416527] [2020-10-13 08:38:23,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:38:23,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:38:23,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224090074] [2020-10-13 08:38:23,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:38:23,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:38:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:38:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:38:23,391 INFO L87 Difference]: Start difference. First operand 1885 states and 3103 transitions. Second operand 5 states. [2020-10-13 08:38:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:38:37,842 INFO L93 Difference]: Finished difference Result 5477 states and 9070 transitions. [2020-10-13 08:38:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:38:37,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-13 08:38:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:38:37,865 INFO L225 Difference]: With dead ends: 5477 [2020-10-13 08:38:37,865 INFO L226 Difference]: Without dead ends: 3598 [2020-10-13 08:38:37,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:38:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2020-10-13 08:38:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3576. [2020-10-13 08:38:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3576 states. [2020-10-13 08:38:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 5528 transitions. [2020-10-13 08:38:37,976 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 5528 transitions. Word has length 132 [2020-10-13 08:38:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:38:37,976 INFO L479 AbstractCegarLoop]: Abstraction has 3576 states and 5528 transitions. [2020-10-13 08:38:37,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:38:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 5528 transitions. [2020-10-13 08:38:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 08:38:37,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:38:37,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:38:37,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 08:38:37,981 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:38:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:38:37,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1340361663, now seen corresponding path program 1 times [2020-10-13 08:38:37,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:38:37,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647724183] [2020-10-13 08:38:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:38:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:38,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:38,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:39,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:39,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 08:38:39,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 08:38:39,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-10-13 08:38:39,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:39,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:38:39,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-13 08:38:39,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 08:38:39,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:38:39,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:38:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:39,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:39,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:38:39,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:39,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:38:39,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:38:39,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:39,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:38:39,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:38:39,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:38:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:39,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:39,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 08:38:39,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:39,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-13 08:38:39,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:38:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 08:38:39,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:38:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:38:39,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647724183] [2020-10-13 08:38:39,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:38:39,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 08:38:39,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090289444] [2020-10-13 08:38:39,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 08:38:39,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:38:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 08:38:39,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:38:39,934 INFO L87 Difference]: Start difference. First operand 3576 states and 5528 transitions. Second operand 6 states. [2020-10-13 08:38:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:38:59,712 INFO L93 Difference]: Finished difference Result 10423 states and 16335 transitions. [2020-10-13 08:38:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:38:59,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2020-10-13 08:38:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:38:59,757 INFO L225 Difference]: With dead ends: 10423 [2020-10-13 08:38:59,757 INFO L226 Difference]: Without dead ends: 6853 [2020-10-13 08:38:59,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 08:38:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6853 states. [2020-10-13 08:38:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6853 to 6848. [2020-10-13 08:38:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6848 states. [2020-10-13 08:38:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 10130 transitions. [2020-10-13 08:38:59,975 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 10130 transitions. Word has length 171 [2020-10-13 08:38:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:38:59,976 INFO L479 AbstractCegarLoop]: Abstraction has 6848 states and 10130 transitions. [2020-10-13 08:38:59,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 08:38:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 10130 transitions. [2020-10-13 08:38:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-13 08:38:59,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:38:59,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:38:59,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 08:38:59,983 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:38:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:38:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1874592428, now seen corresponding path program 1 times [2020-10-13 08:38:59,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:38:59,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839760062] [2020-10-13 08:38:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:39:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:00,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:00,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:01,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:01,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:01,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-13 08:39:01,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 08:39:01,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1650 [2020-10-13 08:39:01,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:01,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:39:01,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-13 08:39:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:39:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:39:01,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:39:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:01,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:01,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:39:01,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:01,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:39:01,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:01,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:39:01,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:01,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:39:01,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:39:01,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:39:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:01,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:02,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:02,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 08:39:02,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:02,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-13 08:39:02,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:02,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:39:02,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-13 08:39:02,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:39:02,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:39:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:39:02,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839760062] [2020-10-13 08:39:02,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 08:39:02,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 08:39:02,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642635228] [2020-10-13 08:39:02,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:39:02,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:39:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:39:02,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:39:02,224 INFO L87 Difference]: Start difference. First operand 6848 states and 10130 transitions. Second operand 5 states. [2020-10-13 08:39:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:39:15,414 INFO L93 Difference]: Finished difference Result 10425 states and 15934 transitions. [2020-10-13 08:39:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:39:15,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2020-10-13 08:39:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:39:15,458 INFO L225 Difference]: With dead ends: 10425 [2020-10-13 08:39:15,458 INFO L226 Difference]: Without dead ends: 6843 [2020-10-13 08:39:15,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:39:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2020-10-13 08:39:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 6839. [2020-10-13 08:39:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6839 states. [2020-10-13 08:39:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6839 states to 6839 states and 10107 transitions. [2020-10-13 08:39:15,664 INFO L78 Accepts]: Start accepts. Automaton has 6839 states and 10107 transitions. Word has length 226 [2020-10-13 08:39:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:39:15,665 INFO L479 AbstractCegarLoop]: Abstraction has 6839 states and 10107 transitions. [2020-10-13 08:39:15,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:39:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6839 states and 10107 transitions. [2020-10-13 08:39:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-13 08:39:15,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:39:15,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:39:15,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 08:39:15,671 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:39:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:39:15,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1688295589, now seen corresponding path program 1 times [2020-10-13 08:39:15,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:39:15,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589896340] [2020-10-13 08:39:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:39:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:15,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:16,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:16,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:17,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:17,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-13 08:39:17,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 08:39:17,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-10-13 08:39:17,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:17,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:39:17,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-10-13 08:39:17,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:39:17,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:39:17,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:39:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:17,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:17,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:39:17,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:17,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:39:17,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:39:17,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:17,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:39:17,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:17,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:39:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:17,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:17,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:17,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 08:39:17,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:17,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-13 08:39:17,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:39:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-13 08:39:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:39:17,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:39:18,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589896340] [2020-10-13 08:39:18,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 08:39:18,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 08:39:18,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604926605] [2020-10-13 08:39:18,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:39:18,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:39:18,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:39:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:39:18,098 INFO L87 Difference]: Start difference. First operand 6839 states and 10107 transitions. Second operand 5 states. [2020-10-13 08:39:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:39:44,525 INFO L93 Difference]: Finished difference Result 16941 states and 25347 transitions. [2020-10-13 08:39:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:39:44,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2020-10-13 08:39:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:39:44,572 INFO L225 Difference]: With dead ends: 16941 [2020-10-13 08:39:44,572 INFO L226 Difference]: Without dead ends: 10108 [2020-10-13 08:39:44,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:39:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10108 states. [2020-10-13 08:39:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10108 to 10091. [2020-10-13 08:39:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10091 states. [2020-10-13 08:39:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10091 states to 10091 states and 13804 transitions. [2020-10-13 08:39:44,812 INFO L78 Accepts]: Start accepts. Automaton has 10091 states and 13804 transitions. Word has length 230 [2020-10-13 08:39:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:39:44,813 INFO L479 AbstractCegarLoop]: Abstraction has 10091 states and 13804 transitions. [2020-10-13 08:39:44,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:39:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10091 states and 13804 transitions. [2020-10-13 08:39:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-13 08:39:44,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:39:44,820 INFO L422 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, 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] [2020-10-13 08:39:44,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 08:39:44,820 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:39:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:39:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1608681017, now seen corresponding path program 1 times [2020-10-13 08:39:44,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:39:44,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058864953] [2020-10-13 08:39:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:39:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:44,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:44,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:45,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:46,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:49,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:49,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-13 08:39:49,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 08:39:49,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 08:39:49,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 08:39:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 08:39:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 08:39:49,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:39:50,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:39:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:50,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:50,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:50,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:39:50,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:50,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 08:39:50,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:39:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:39:50,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:50,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:39:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:50,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:50,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:50,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 08:39:50,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:50,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 08:39:50,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:39:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 08:39:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:50,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 08:39:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:50,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:50,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:50,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:50,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 08:39:50,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 08:39:50,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-13 08:39:50,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:50,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 08:39:50,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 08:39:50,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 08:39:50,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 08:39:51,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058864953] [2020-10-13 08:39:51,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:39:51,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 08:39:51,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557966581] [2020-10-13 08:39:51,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 08:39:51,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:39:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 08:39:51,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 08:39:51,512 INFO L87 Difference]: Start difference. First operand 10091 states and 13804 transitions. Second operand 7 states. [2020-10-13 08:39:51,776 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-13 08:39:52,103 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-13 08:39:52,499 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-13 08:39:52,951 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-13 08:39:53,537 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-13 08:40:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:40:11,221 INFO L93 Difference]: Finished difference Result 16335 states and 23137 transitions. [2020-10-13 08:40:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 08:40:11,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 244 [2020-10-13 08:40:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:40:11,261 INFO L225 Difference]: With dead ends: 16335 [2020-10-13 08:40:11,261 INFO L226 Difference]: Without dead ends: 10286 [2020-10-13 08:40:11,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-13 08:40:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2020-10-13 08:40:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 10118. [2020-10-13 08:40:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10118 states. [2020-10-13 08:40:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10118 states to 10118 states and 13867 transitions. [2020-10-13 08:40:11,586 INFO L78 Accepts]: Start accepts. Automaton has 10118 states and 13867 transitions. Word has length 244 [2020-10-13 08:40:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:40:11,587 INFO L479 AbstractCegarLoop]: Abstraction has 10118 states and 13867 transitions. [2020-10-13 08:40:11,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 08:40:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10118 states and 13867 transitions. [2020-10-13 08:40:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 08:40:11,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:40:11,594 INFO L422 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, 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] [2020-10-13 08:40:11,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 08:40:11,594 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:40:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:40:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2130185573, now seen corresponding path program 1 times [2020-10-13 08:40:11,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:40:11,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593776991] [2020-10-13 08:40:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:40:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:11,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:11,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:12,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:12,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:15,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:16,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:16,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-13 08:40:16,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 08:40:16,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 08:40:16,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 08:40:16,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-13 08:40:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 08:40:16,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:40:16,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:40:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:16,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:16,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:16,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:40:16,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 08:40:16,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:16,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:16,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:40:16,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:40:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:16,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:16,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:16,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 08:40:16,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:16,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 08:40:16,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:16,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:16,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:16,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:16,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 08:40:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:16,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:17,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:17,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 08:40:17,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:17,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 08:40:17,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:17,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 08:40:17,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:17,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 08:40:17,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:40:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 08:40:17,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593776991] [2020-10-13 08:40:17,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:40:17,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 08:40:17,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922908188] [2020-10-13 08:40:17,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 08:40:17,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:40:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 08:40:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 08:40:17,386 INFO L87 Difference]: Start difference. First operand 10118 states and 13867 transitions. Second operand 7 states. [2020-10-13 08:40:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:40:44,257 INFO L93 Difference]: Finished difference Result 26780 states and 37479 transitions. [2020-10-13 08:40:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 08:40:44,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 245 [2020-10-13 08:40:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:40:44,322 INFO L225 Difference]: With dead ends: 26780 [2020-10-13 08:40:44,322 INFO L226 Difference]: Without dead ends: 16611 [2020-10-13 08:40:44,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-13 08:40:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16611 states. [2020-10-13 08:40:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16611 to 14178. [2020-10-13 08:40:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14178 states. [2020-10-13 08:40:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14178 states to 14178 states and 18710 transitions. [2020-10-13 08:40:44,691 INFO L78 Accepts]: Start accepts. Automaton has 14178 states and 18710 transitions. Word has length 245 [2020-10-13 08:40:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:40:44,692 INFO L479 AbstractCegarLoop]: Abstraction has 14178 states and 18710 transitions. [2020-10-13 08:40:44,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 08:40:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 14178 states and 18710 transitions. [2020-10-13 08:40:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-13 08:40:44,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:40:44,700 INFO L422 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, 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] [2020-10-13 08:40:44,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 08:40:44,701 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:40:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:40:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1357111755, now seen corresponding path program 1 times [2020-10-13 08:40:44,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:40:44,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215583946] [2020-10-13 08:40:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:40:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:44,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:44,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:46,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:48,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-13 08:40:48,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 08:40:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3906 [2020-10-13 08:40:48,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:40:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-10-13 08:40:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 08:40:48,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:40:48,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:40:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:48,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:48,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:48,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:40:48,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:48,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 08:40:48,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:48,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:48,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 08:40:48,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:40:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:48,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:48,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 08:40:48,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 08:40:48,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:48,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:48,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:48,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 08:40:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:48,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:49,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:49,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 08:40:49,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:49,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-13 08:40:49,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:40:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 08:40:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-13 08:40:49,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215583946] [2020-10-13 08:40:49,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:40:49,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:40:49,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374115919] [2020-10-13 08:40:49,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:40:49,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:40:49,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:40:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:40:49,236 INFO L87 Difference]: Start difference. First operand 14178 states and 18710 transitions. Second operand 5 states. [2020-10-13 08:41:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:41:11,244 INFO L93 Difference]: Finished difference Result 31622 states and 42281 transitions. [2020-10-13 08:41:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:41:11,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 246 [2020-10-13 08:41:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:41:11,312 INFO L225 Difference]: With dead ends: 31622 [2020-10-13 08:41:11,312 INFO L226 Difference]: Without dead ends: 17450 [2020-10-13 08:41:11,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:41:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17450 states. [2020-10-13 08:41:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17450 to 16629. [2020-10-13 08:41:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16629 states. [2020-10-13 08:41:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16629 states to 16629 states and 21635 transitions. [2020-10-13 08:41:11,687 INFO L78 Accepts]: Start accepts. Automaton has 16629 states and 21635 transitions. Word has length 246 [2020-10-13 08:41:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:41:11,688 INFO L479 AbstractCegarLoop]: Abstraction has 16629 states and 21635 transitions. [2020-10-13 08:41:11,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:41:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16629 states and 21635 transitions. [2020-10-13 08:41:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-13 08:41:11,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:41:11,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:41:11,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 08:41:11,700 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:41:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:41:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash 383547520, now seen corresponding path program 1 times [2020-10-13 08:41:11,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:41:11,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929043377] [2020-10-13 08:41:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:41:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:41:11,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:41:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:41:12,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:41:12,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-13 08:41:12,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 08:41:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-13 08:41:12,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:41:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:41:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-10-13 08:41:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 08:41:12,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:41:12,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:41:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:41:12,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:41:12,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:41:12,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:41:12,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:41:12,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 08:41:12,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:41:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:41:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:41:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:41:12,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:41:12,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:41:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:41:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:41:12,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:41:12,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-13 08:41:12,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:41:12,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-13 08:41:12,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:41:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:41:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:41:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-13 08:41:12,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:41:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:41:13,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929043377] [2020-10-13 08:41:13,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:41:13,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:41:13,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177882781] [2020-10-13 08:41:13,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:41:13,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:41:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:41:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:41:13,147 INFO L87 Difference]: Start difference. First operand 16629 states and 21635 transitions. Second operand 5 states.